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        "currency": "USD",
        "date": "2026-03-15",
        "form_summary": "metal",
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        "source_type": "median_aggregate",
        "sources": [
          "alb-materials-01",
          "edgetech-industries-01",
          "stanford-advanced-materials-01"
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          "observation_count": 0,
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            "30d": null,
            "7d": null,
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            "30d": null,
            "7d": null,
            "90d": null,
            "all_time": null
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      "data_since": "2026-03-15",
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        "currency": "USD",
        "date": "2026-04-04",
        "form_summary": "oxide",
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        "source_type": "median_aggregate",
        "sources": [
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          "Star Earth Minerals (Alibaba)"
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        "currency": "USD",
        "date": "2026-04-04",
        "form_summary": "metal, oxide",
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        "price_per_kg": 28.0,
        "source_type": "median_aggregate",
        "sources": [
          "Luciteria",
          "Various polishing sellers (eBay)",
          "leroy500 (eBay)"
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          "observation_count": 2,
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            "7d": null,
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            "7d": null,
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              "actual_span_days": 20,
              "confidence": "low",
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              "end_date": "2026-04-04",
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              "start_date": "2026-03-15",
              "start_price": 2.0,
              "window_days": 365
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              "actual_span_days": 20,
              "confidence": "low",
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              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
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              "start_date": "2026-03-15",
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              "window_days": 30
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              "actual_span_days": 20,
              "confidence": "low",
              "confidence_note": "Based on 7 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
              "end_price": 211.0,
              "observations_in_window": 7,
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              "start_date": "2026-03-15",
              "start_price": 2.0,
              "window_days": 90
            },
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              "abs_change": 209.0,
              "actual_span_days": 20,
              "confidence": "low",
              "confidence_note": "Based on 7 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
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              "start_date": "2026-03-15",
              "start_price": 2.0,
              "window_days": null
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          }
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      "data_since": "2026-03-15",
      "data_until": "2026-04-04",
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        "contributing_observations": 1,
        "currency": "USD",
        "date": "2026-03-15",
        "form_summary": "metal",
        "notes": "Median of 1 bulk offers (LME / Fastmarkets)",
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        "source_type": "median_aggregate",
        "sources": [
          "LME / Fastmarkets"
        ]
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      "latest_retail_price": {
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        "currency": "USD",
        "date": "2026-04-04",
        "form_summary": "metal",
        "notes": "Median of 3 retail offers (Metallos.de, discountelements (eBay), emovendo (eBay))",
        "price_per_kg": 540.0,
        "source_type": "median_aggregate",
        "sources": [
          "discountelements (eBay)",
          "emovendo (eBay)"
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          "observation_count": 1,
          "windows": {
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            "90d": null,
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              "actual_span_days": 20,
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              "confidence_note": "Based on 3 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
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              "pct_change": 174.17,
              "start_date": "2026-03-15",
              "start_price": 540.0,
              "window_days": 365
            },
            "30d": {
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              "actual_span_days": 20,
              "confidence": "low",
              "confidence_note": "Based on 3 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
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              "start_date": "2026-03-15",
              "start_price": 540.0,
              "window_days": 30
            },
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              "actual_span_days": 20,
              "confidence": "low",
              "confidence_note": "Based on 3 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
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              "start_date": "2026-03-15",
              "start_price": 540.0,
              "window_days": 90
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              "confidence": "low",
              "confidence_note": "Based on 3 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
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              "window_days": null
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      "data_until": "2026-04-04",
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        "currency": "USD",
        "date": "2026-04-04",
        "form_summary": "oxide",
        "notes": "Median of 1 bulk offers (Hebei Saiweisi (Alibaba))",
        "price_per_kg": 110.0,
        "source_type": "median_aggregate",
        "sources": [
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        "currency": "USD",
        "date": "2026-04-04",
        "form_summary": "metal, oxide",
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        "price_per_kg": 380.0,
        "source_type": "median_aggregate",
        "sources": [
          "Luciteria",
          "leroy500 (eBay)",
          "novaelements (eBay)",
          "the_periodic_guy (eBay)"
        ]
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      "tiers": {
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          "observation_count": 1,
          "windows": {
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              "actual_span_days": 20,
              "confidence": "low",
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              "start_price": 340.0,
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              "end_date": "2026-04-04",
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              "start_date": "2026-03-15",
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        "date": "2026-04-04",
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        "price_per_kg": 1887.0,
        "source_type": "median_aggregate",
        "sources": [
          "Luciteria",
          "novaelements (eBay)",
          "snaucke-elements (eBay)"
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              "actual_span_days": 20,
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              "end_date": "2026-04-04",
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        "date": "2026-04-04",
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        "source_type": "median_aggregate",
        "sources": [
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        ]
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          "windows": {
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              "actual_span_days": 20,
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              "end_date": "2026-04-04",
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              "pct_change": 12566.67,
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              "start_price": 30.0,
              "window_days": 365
            },
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              "confidence": "low",
              "confidence_note": "Based on 4 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "up",
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              "end_date": "2026-04-04",
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              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
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              "window_days": 90
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              "confidence": "low",
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              "direction": "up",
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              "end_date": "2026-04-04",
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              "window_days": null
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        "currency": "USD",
        "date": "2026-04-04",
        "form_summary": "metal",
        "notes": "Median of 1 bulk offers (Multiple CN/DE/PH suppliers (Alibaba))",
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        "source_type": "median_aggregate",
        "sources": [
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        "currency": "USD",
        "date": "2026-04-04",
        "form_summary": "metal",
        "notes": "Median of 8 retail offers (ALB Materials, American Elements, Edgetech Industries, Goodfellow + 3 more)",
        "price_per_kg": 410.0,
        "source_type": "median_aggregate",
        "sources": [
          "Luciteria",
          "Multiple toy sellers (eBay)"
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          "windows": {
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              "actual_span_days": 20,
              "confidence": "low",
              "confidence_note": "Based on 8 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "down",
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              "confidence_note": "Based on 8 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "down",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
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              "start_date": "2026-03-15",
              "start_price": 420.0,
              "window_days": 30
            },
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              "confidence": "low",
              "confidence_note": "Based on 8 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "down",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
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              "start_date": "2026-03-15",
              "start_price": 420.0,
              "window_days": 90
            },
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              "confidence": "low",
              "confidence_note": "Based on 8 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "down",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
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              "start_date": "2026-03-15",
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            }
          }
        }
      }
    },
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      "data_quality": "moderate",
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      "latest_retail_price": {
        "contributing_observations": 9,
        "currency": "USD",
        "date": "2026-04-04",
        "form_summary": "metal, oxide",
        "notes": "Median of 13 retail offers (ALB Materials, Edgetech Industries, Goodfellow, Luciteria + 8 more)",
        "price_per_kg": 507.0,
        "source_type": "median_aggregate",
        "sources": [
          "Luciteria",
          "auremo-eu (eBay)",
          "chemstore2017 (eBay)",
          "evek-gmbh (eBay)",
          "leroy500 (eBay)",
          "novaelements (eBay)",
          "snaucke-elements (eBay)",
          "vkris_1 (eBay)"
        ]
      },
      "observation_count": 13,
      "tiers": {
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          "observation_count": 0,
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          }
        },
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          }
        },
        "retail": {
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              "actual_span_days": 20,
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              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
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              "actual_span_days": 20,
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              "direction": "up",
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              "end_date": "2026-04-04",
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              "window_days": 30
            },
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              "confidence": "low",
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              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
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              "start_date": "2026-03-15",
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              "window_days": 90
            },
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              "confidence": "low",
              "confidence_note": "Based on 13 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
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          }
        }
      }
    },
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      "data_since": "2026-03-15",
      "data_until": "2026-04-04",
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      "latest_retail_price": {
        "contributing_observations": 1,
        "currency": "USD",
        "date": "2026-04-04",
        "form_summary": "metal",
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        "price_per_kg": 1450.0,
        "source_type": "median_aggregate",
        "sources": [
          "Luciteria"
        ]
      },
      "observation_count": 5,
      "tiers": {
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          "observation_count": 0,
          "windows": {
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          }
        },
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          }
        },
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              "start_price": 1375.0,
              "window_days": 365
            },
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              "actual_span_days": 20,
              "confidence": "low",
              "confidence_note": "Based on 5 observation(s) across 2 distinct day(s), spanning 20 day(s).",
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              "distinct_days_in_window": 2,
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            },
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              "actual_span_days": 20,
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              "confidence_note": "Based on 5 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
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              "window_days": 90
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          }
        }
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    },
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      "data_until": "2026-03-29",
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        "date": "2026-03-29",
        "form_summary": "metal, oxide",
        "notes": "Median of 5 bulk offers (BusinessAnalytiq, IMARC, Made-in-China.com (Ganzhou Wanfeng))",
        "price_per_kg": 106.0,
        "source_type": "median_aggregate",
        "sources": [
          "businessanalytiq-ho-01",
          "metallos-ho-01",
          "mic-ho-01",
          "smm-earthrarest-ho-01"
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      },
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        "date": "2026-03-29",
        "form_summary": "metal, oxide",
        "notes": null,
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        "source_type": "individual_median",
        "sources": [
          "alfa-aesar-ho-01",
          "alfa-aesar-ho-02",
          "alfa-aesar-ho-oxide-01",
          "alfa-aesar-ho-oxide-02",
          "chemsavers-ho-01",
          "mse-ho-01",
          "mse-ho-02",
          "sigma-ho-01"
        ]
      },
      "latest_retail_price": {
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        "date": "2026-03-29",
        "form_summary": "metal, oxide",
        "notes": "Median of 18 retail offers (ALB Materials, Alfa Aesar, Alfa Aesar (Acros), Alfa Aesar / Thermo Fisher + 8 more)",
        "price_per_kg": 4864.5,
        "source_type": "median_aggregate",
        "sources": [
          "luciteria-ho-01",
          "rwmm-ho-01",
          "smart-elements-ho-01",
          "smart-elements-ho-02",
          "smart-elements-ho-03",
          "smart-elements-ho-04",
          "smart-elements-ho-05"
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      },
      "observation_count": 23,
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          "distinct_days": 2,
          "observation_count": 5,
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              "abs_change": 9.0,
              "actual_span_days": 29,
              "confidence": "low",
              "confidence_note": "Based on 5 observation(s) across 2 distinct day(s), spanning 29 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
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              "window_days": 365
            },
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              "confidence": "low",
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              "confidence_note": "Based on 5 observation(s) across 2 distinct day(s), spanning 29 day(s).",
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              "distinct_days_in_window": 2,
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              "window_days": 90
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              "distinct_days_in_window": 2,
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              "distinct_days_in_window": 2,
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              "confidence": "low",
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              "end_date": "2026-04-04",
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        "price_per_kg": 685.0,
        "source_type": "median_aggregate",
        "sources": [
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          "chemstore2017 (eBay)",
          "engineeredlab (eBay)",
          "joenicks (eBay)",
          "leroy500 (eBay)"
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              "pct_change": 761400.0,
              "start_date": "2026-03-15",
              "start_price": 2.0,
              "window_days": null
            }
          }
        }
      }
    },
    "Li": {
      "data_quality": "sparse",
      "data_since": "2026-03-15",
      "data_until": "2026-03-15",
      "distinct_days": 1,
      "latest_bulk_price": {
        "contributing_observations": 1,
        "currency": "USD",
        "date": "2026-03-15",
        "form_summary": "compound",
        "notes": "Median of 1 bulk offers (Fastmarkets / SMM)",
        "price_per_kg": 10.0,
        "source_type": "median_aggregate",
        "sources": [
          "Fastmarkets / SMM"
        ]
      },
      "latest_lab_price": null,
      "latest_retail_price": {
        "contributing_observations": 1,
        "currency": "USD",
        "date": "2026-03-15",
        "form_summary": "metal",
        "notes": "Median of 1 retail offers (Smart-Elements)",
        "price_per_kg": 6500.0,
        "source_type": "median_aggregate",
        "sources": [
          "Smart-Elements"
        ]
      },
      "observation_count": 2,
      "tiers": {
        "bulk": {
          "distinct_days": 1,
          "observation_count": 1,
          "windows": {
            "1y": null,
            "30d": null,
            "7d": null,
            "90d": null,
            "all_time": null
          }
        },
        "lab": {
          "distinct_days": 0,
          "observation_count": 0,
          "windows": {
            "1y": null,
            "30d": null,
            "7d": null,
            "90d": null,
            "all_time": null
          }
        },
        "retail": {
          "distinct_days": 1,
          "observation_count": 1,
          "windows": {
            "1y": null,
            "30d": null,
            "7d": null,
            "90d": null,
            "all_time": null
          }
        }
      }
    },
    "Lu": {
      "data_quality": "rich",
      "data_since": "2026-01-31",
      "data_until": "2026-03-30",
      "distinct_days": 4,
      "latest_bulk_price": {
        "contributing_observations": 1,
        "currency": "USD",
        "date": "2026-03-30",
        "form_summary": "oxide",
        "notes": "Median of 3 bulk offers (BusinessAnalytiq (NE Asia), Ganzhou Wanfeng (Made-in-China), SMM (Shanghai Metals Market))",
        "price_per_kg": 707.0,
        "source_type": "median_aggregate",
        "sources": [
          "BusinessAnalytiq (NE Asia)"
        ]
      },
      "latest_lab_price": null,
      "latest_retail_price": {
        "contributing_observations": 6,
        "currency": "USD",
        "date": "2026-03-29",
        "form_summary": "metal, oxide",
        "notes": "Median of 9 retail offers (American Elements, Chemsavers, Edgetech Industries, PEGUYS + 4 more)",
        "price_per_kg": 16800.0,
        "source_type": "median_aggregate",
        "sources": [
          "Chemsavers",
          "PEGUYS",
          "Smart-Elements",
          "Thermo Fisher (Alfa Aesar)",
          "chineseelements (eBay)"
        ]
      },
      "observation_count": 12,
      "tiers": {
        "bulk": {
          "distinct_days": 3,
          "observation_count": 3,
          "windows": {
            "1y": {
              "abs_change": 54.0,
              "actual_span_days": 58,
              "confidence": "medium",
              "confidence_note": "Based on 3 observation(s) across 3 distinct day(s), spanning 58 day(s).",
              "direction": "up",
              "distinct_days_in_window": 3,
              "end_date": "2026-03-30",
              "end_price": 707.0,
              "observations_in_window": 3,
              "pct_change": 8.27,
              "start_date": "2026-01-31",
              "start_price": 653.0,
              "window_days": 365
            },
            "30d": {
              "abs_change": -93.0,
              "actual_span_days": 1,
              "confidence": "low",
              "confidence_note": "Based on 2 observation(s) across 2 distinct day(s), spanning 1 day(s).",
              "direction": "down",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-30",
              "end_price": 707.0,
              "observations_in_window": 2,
              "pct_change": -11.62,
              "start_date": "2026-03-29",
              "start_price": 800.0,
              "window_days": 30
            },
            "7d": {
              "abs_change": -93.0,
              "actual_span_days": 1,
              "confidence": "low",
              "confidence_note": "Based on 2 observation(s) across 2 distinct day(s), spanning 1 day(s).",
              "direction": "down",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-30",
              "end_price": 707.0,
              "observations_in_window": 2,
              "pct_change": -11.62,
              "start_date": "2026-03-29",
              "start_price": 800.0,
              "window_days": 7
            },
            "90d": {
              "abs_change": 54.0,
              "actual_span_days": 58,
              "confidence": "medium",
              "confidence_note": "Based on 3 observation(s) across 3 distinct day(s), spanning 58 day(s).",
              "direction": "up",
              "distinct_days_in_window": 3,
              "end_date": "2026-03-30",
              "end_price": 707.0,
              "observations_in_window": 3,
              "pct_change": 8.27,
              "start_date": "2026-01-31",
              "start_price": 653.0,
              "window_days": 90
            },
            "all_time": {
              "abs_change": 54.0,
              "actual_span_days": 58,
              "confidence": "medium",
              "confidence_note": "Based on 3 observation(s) across 3 distinct day(s), spanning 58 day(s).",
              "direction": "up",
              "distinct_days_in_window": 3,
              "end_date": "2026-03-30",
              "end_price": 707.0,
              "observations_in_window": 3,
              "pct_change": 8.27,
              "start_date": "2026-01-31",
              "start_price": 653.0,
              "window_days": null
            }
          }
        },
        "lab": {
          "distinct_days": 0,
          "observation_count": 0,
          "windows": {
            "1y": null,
            "30d": null,
            "7d": null,
            "90d": null,
            "all_time": null
          }
        },
        "retail": {
          "distinct_days": 2,
          "observation_count": 9,
          "windows": {
            "1y": {
              "abs_change": 37410.0,
              "actual_span_days": 14,
              "confidence": "low",
              "confidence_note": "Based on 9 observation(s) across 2 distinct day(s), spanning 14 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-29",
              "end_price": 45910.0,
              "observations_in_window": 9,
              "pct_change": 440.12,
              "start_date": "2026-03-15",
              "start_price": 8500.0,
              "window_days": 365
            },
            "30d": {
              "abs_change": 37410.0,
              "actual_span_days": 14,
              "confidence": "low",
              "confidence_note": "Based on 9 observation(s) across 2 distinct day(s), spanning 14 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-29",
              "end_price": 45910.0,
              "observations_in_window": 9,
              "pct_change": 440.12,
              "start_date": "2026-03-15",
              "start_price": 8500.0,
              "window_days": 30
            },
            "7d": null,
            "90d": {
              "abs_change": 37410.0,
              "actual_span_days": 14,
              "confidence": "low",
              "confidence_note": "Based on 9 observation(s) across 2 distinct day(s), spanning 14 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-29",
              "end_price": 45910.0,
              "observations_in_window": 9,
              "pct_change": 440.12,
              "start_date": "2026-03-15",
              "start_price": 8500.0,
              "window_days": 90
            },
            "all_time": {
              "abs_change": 37410.0,
              "actual_span_days": 14,
              "confidence": "low",
              "confidence_note": "Based on 9 observation(s) across 2 distinct day(s), spanning 14 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-29",
              "end_price": 45910.0,
              "observations_in_window": 9,
              "pct_change": 440.12,
              "start_date": "2026-03-15",
              "start_price": 8500.0,
              "window_days": null
            }
          }
        }
      }
    },
    "Mo": {
      "data_quality": "sparse",
      "data_since": "2026-03-15",
      "data_until": "2026-03-15",
      "distinct_days": 1,
      "latest_bulk_price": null,
      "latest_lab_price": null,
      "latest_retail_price": {
        "contributing_observations": 4,
        "currency": "USD",
        "date": "2026-03-15",
        "form_summary": "powder",
        "notes": "Median of 4 retail offers (ALB Materials, American Elements, Edgetech Industries, Stanford Advanced Materials)",
        "price_per_kg": 64.0,
        "source_type": "median_aggregate",
        "sources": [
          "alb-materials-01",
          "american-elements-01",
          "edgetech-industries-01",
          "stanford-advanced-materials-01"
        ]
      },
      "observation_count": 4,
      "tiers": {
        "bulk": {
          "distinct_days": 0,
          "observation_count": 0,
          "windows": {
            "1y": null,
            "30d": null,
            "7d": null,
            "90d": null,
            "all_time": null
          }
        },
        "lab": {
          "distinct_days": 0,
          "observation_count": 0,
          "windows": {
            "1y": null,
            "30d": null,
            "7d": null,
            "90d": null,
            "all_time": null
          }
        },
        "retail": {
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          "observation_count": 4,
          "windows": {
            "1y": null,
            "30d": null,
            "7d": null,
            "90d": null,
            "all_time": null
          }
        }
      }
    },
    "Nb": {
      "data_quality": "moderate",
      "data_since": "2026-03-15",
      "data_until": "2026-04-04",
      "distinct_days": 2,
      "latest_bulk_price": {
        "contributing_observations": 1,
        "currency": "USD",
        "date": "2026-04-04",
        "form_summary": "metal",
        "notes": "Median of 2 bulk offers (Fastmarkets / CBMM benchmark, Tianjin Chengmai (Alibaba))",
        "price_per_kg": 71.5,
        "source_type": "median_aggregate",
        "sources": [
          "Tianjin Chengmai (Alibaba)"
        ]
      },
      "latest_lab_price": null,
      "latest_retail_price": {
        "contributing_observations": 1,
        "currency": "USD",
        "date": "2026-04-04",
        "form_summary": "metal",
        "notes": "Median of 2 retail offers (Smart-Elements, navycbmichael (eBay))",
        "price_per_kg": 925.5,
        "source_type": "median_aggregate",
        "sources": [
          "navycbmichael (eBay)"
        ]
      },
      "observation_count": 4,
      "tiers": {
        "bulk": {
          "distinct_days": 2,
          "observation_count": 2,
          "windows": {
            "1y": {
              "abs_change": -3.0,
              "actual_span_days": 20,
              "confidence": "low",
              "confidence_note": "Based on 2 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "down",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
              "end_price": 70.0,
              "observations_in_window": 2,
              "pct_change": -4.11,
              "start_date": "2026-03-15",
              "start_price": 73.0,
              "window_days": 365
            },
            "30d": {
              "abs_change": -3.0,
              "actual_span_days": 20,
              "confidence": "low",
              "confidence_note": "Based on 2 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "down",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
              "end_price": 70.0,
              "observations_in_window": 2,
              "pct_change": -4.11,
              "start_date": "2026-03-15",
              "start_price": 73.0,
              "window_days": 30
            },
            "7d": null,
            "90d": {
              "abs_change": -3.0,
              "actual_span_days": 20,
              "confidence": "low",
              "confidence_note": "Based on 2 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "down",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
              "end_price": 70.0,
              "observations_in_window": 2,
              "pct_change": -4.11,
              "start_date": "2026-03-15",
              "start_price": 73.0,
              "window_days": 90
            },
            "all_time": {
              "abs_change": -3.0,
              "actual_span_days": 20,
              "confidence": "low",
              "confidence_note": "Based on 2 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "down",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
              "end_price": 70.0,
              "observations_in_window": 2,
              "pct_change": -4.11,
              "start_date": "2026-03-15",
              "start_price": 73.0,
              "window_days": null
            }
          }
        },
        "lab": {
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          "windows": {
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            "7d": null,
            "90d": null,
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          }
        },
        "retail": {
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          "observation_count": 2,
          "windows": {
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              "abs_change": -1149.0,
              "actual_span_days": 20,
              "confidence": "low",
              "confidence_note": "Based on 2 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "down",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
              "end_price": 351.0,
              "observations_in_window": 2,
              "pct_change": -76.6,
              "start_date": "2026-03-15",
              "start_price": 1500.0,
              "window_days": 365
            },
            "30d": {
              "abs_change": -1149.0,
              "actual_span_days": 20,
              "confidence": "low",
              "confidence_note": "Based on 2 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "down",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
              "end_price": 351.0,
              "observations_in_window": 2,
              "pct_change": -76.6,
              "start_date": "2026-03-15",
              "start_price": 1500.0,
              "window_days": 30
            },
            "7d": null,
            "90d": {
              "abs_change": -1149.0,
              "actual_span_days": 20,
              "confidence": "low",
              "confidence_note": "Based on 2 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "down",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
              "end_price": 351.0,
              "observations_in_window": 2,
              "pct_change": -76.6,
              "start_date": "2026-03-15",
              "start_price": 1500.0,
              "window_days": 90
            },
            "all_time": {
              "abs_change": -1149.0,
              "actual_span_days": 20,
              "confidence": "low",
              "confidence_note": "Based on 2 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "down",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
              "end_price": 351.0,
              "observations_in_window": 2,
              "pct_change": -76.6,
              "start_date": "2026-03-15",
              "start_price": 1500.0,
              "window_days": null
            }
          }
        }
      }
    },
    "Nd": {
      "data_quality": "moderate",
      "data_since": "2026-03-15",
      "data_until": "2026-04-04",
      "distinct_days": 2,
      "latest_bulk_price": {
        "contributing_observations": 1,
        "currency": "USD",
        "date": "2026-04-04",
        "form_summary": "metal",
        "notes": "Median of 1 bulk offers (Ganzhou Wanfeng (Alibaba))",
        "price_per_kg": 80.0,
        "source_type": "median_aggregate",
        "sources": [
          "Ganzhou Wanfeng (Alibaba)"
        ]
      },
      "latest_lab_price": null,
      "latest_retail_price": {
        "contributing_observations": 5,
        "currency": "USD",
        "date": "2026-04-04",
        "form_summary": "metal, oxide",
        "notes": "Median of 9 retail offers (ALB Materials, American Elements, Edgetech Industries, Luciteria + 5 more)",
        "price_per_kg": 600.0,
        "source_type": "median_aggregate",
        "sources": [
          "Luciteria",
          "auremo-eu (eBay)",
          "chemsaversinc1 (eBay)",
          "engineeredlab (eBay)",
          "novaelements (eBay)"
        ]
      },
      "observation_count": 10,
      "tiers": {
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          "distinct_days": 1,
          "observation_count": 1,
          "windows": {
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            "30d": null,
            "7d": null,
            "90d": null,
            "all_time": null
          }
        },
        "lab": {
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            "7d": null,
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          }
        },
        "retail": {
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          "observation_count": 9,
          "windows": {
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              "abs_change": 11658.5,
              "actual_span_days": 20,
              "confidence": "low",
              "confidence_note": "Based on 9 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
              "end_price": 11750.0,
              "observations_in_window": 9,
              "pct_change": 12741.53,
              "start_date": "2026-03-15",
              "start_price": 91.5,
              "window_days": 365
            },
            "30d": {
              "abs_change": 11658.5,
              "actual_span_days": 20,
              "confidence": "low",
              "confidence_note": "Based on 9 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
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              "observations_in_window": 9,
              "pct_change": 12741.53,
              "start_date": "2026-03-15",
              "start_price": 91.5,
              "window_days": 30
            },
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            "90d": {
              "abs_change": 11658.5,
              "actual_span_days": 20,
              "confidence": "low",
              "confidence_note": "Based on 9 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
              "end_price": 11750.0,
              "observations_in_window": 9,
              "pct_change": 12741.53,
              "start_date": "2026-03-15",
              "start_price": 91.5,
              "window_days": 90
            },
            "all_time": {
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              "actual_span_days": 20,
              "confidence": "low",
              "confidence_note": "Based on 9 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
              "end_price": 11750.0,
              "observations_in_window": 9,
              "pct_change": 12741.53,
              "start_date": "2026-03-15",
              "start_price": 91.5,
              "window_days": null
            }
          }
        }
      }
    },
    "Pr": {
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      "data_since": "2026-03-15",
      "data_until": "2026-04-04",
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      "latest_bulk_price": null,
      "latest_lab_price": null,
      "latest_retail_price": {
        "contributing_observations": 2,
        "currency": "USD",
        "date": "2026-04-04",
        "form_summary": "metal, oxide",
        "notes": "Median of 5 retail offers (ALB Materials, Edgetech Industries, Luciteria, Stanford Advanced Materials)",
        "price_per_kg": 90.0,
        "source_type": "median_aggregate",
        "sources": [
          "Luciteria"
        ]
      },
      "observation_count": 5,
      "tiers": {
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          "distinct_days": 0,
          "observation_count": 0,
          "windows": {
            "1y": null,
            "30d": null,
            "7d": null,
            "90d": null,
            "all_time": null
          }
        },
        "lab": {
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          "observation_count": 0,
          "windows": {
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            "7d": null,
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            "all_time": null
          }
        },
        "retail": {
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          "observation_count": 5,
          "windows": {
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              "abs_change": 15085.5,
              "actual_span_days": 20,
              "confidence": "low",
              "confidence_note": "Based on 5 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
              "end_price": 15170.5,
              "observations_in_window": 5,
              "pct_change": 17747.65,
              "start_date": "2026-03-15",
              "start_price": 85.0,
              "window_days": 365
            },
            "30d": {
              "abs_change": 15085.5,
              "actual_span_days": 20,
              "confidence": "low",
              "confidence_note": "Based on 5 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
              "end_price": 15170.5,
              "observations_in_window": 5,
              "pct_change": 17747.65,
              "start_date": "2026-03-15",
              "start_price": 85.0,
              "window_days": 30
            },
            "7d": null,
            "90d": {
              "abs_change": 15085.5,
              "actual_span_days": 20,
              "confidence": "low",
              "confidence_note": "Based on 5 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "up",
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              "end_date": "2026-04-04",
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        "date": "2026-03-29",
        "form_summary": "metal, oxide",
        "notes": "Median of 12 retail offers (ALB Materials, American Elements, Chemsavers, Edgetech Industries + 7 more)",
        "price_per_kg": 629.0,
        "source_type": "median_aggregate",
        "sources": [
          "Chemsavers",
          "Luciteria",
          "MSE Supplies",
          "PEGUYS",
          "RWMM",
          "Smart-Elements",
          "Strategic Metals Invest"
        ]
      },
      "observation_count": 17,
      "tiers": {
        "bulk": {
          "distinct_days": 4,
          "observation_count": 5,
          "windows": {
            "1y": {
              "abs_change": 473.0,
              "actual_span_days": 35,
              "confidence": "medium",
              "confidence_note": "Based on 5 observation(s) across 4 distinct day(s), spanning 35 day(s).",
              "direction": "up",
              "distinct_days_in_window": 4,
              "end_date": "2026-04-04",
              "end_price": 590.0,
              "observations_in_window": 5,
              "pct_change": 404.27,
              "start_date": "2026-02-28",
              "start_price": 117.0,
              "window_days": 365
            },
            "30d": {
              "abs_change": 482.0,
              "actual_span_days": 10,
              "confidence": "medium",
              "confidence_note": "Based on 4 observation(s) across 3 distinct day(s), spanning 10 day(s).",
              "direction": "up",
              "distinct_days_in_window": 3,
              "end_date": "2026-04-04",
              "end_price": 590.0,
              "observations_in_window": 4,
              "pct_change": 446.3,
              "start_date": "2026-03-25",
              "start_price": 108.0,
              "window_days": 30
            },
            "7d": {
              "abs_change": 478.0,
              "actual_span_days": 5,
              "confidence": "low",
              "confidence_note": "Based on 3 observation(s) across 2 distinct day(s), spanning 5 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
              "end_price": 590.0,
              "observations_in_window": 3,
              "pct_change": 426.79,
              "start_date": "2026-03-30",
              "start_price": 112.0,
              "window_days": 7
            },
            "90d": {
              "abs_change": 473.0,
              "actual_span_days": 35,
              "confidence": "medium",
              "confidence_note": "Based on 5 observation(s) across 4 distinct day(s), spanning 35 day(s).",
              "direction": "up",
              "distinct_days_in_window": 4,
              "end_date": "2026-04-04",
              "end_price": 590.0,
              "observations_in_window": 5,
              "pct_change": 404.27,
              "start_date": "2026-02-28",
              "start_price": 117.0,
              "window_days": 90
            },
            "all_time": {
              "abs_change": 473.0,
              "actual_span_days": 35,
              "confidence": "medium",
              "confidence_note": "Based on 5 observation(s) across 4 distinct day(s), spanning 35 day(s).",
              "direction": "up",
              "distinct_days_in_window": 4,
              "end_date": "2026-04-04",
              "end_price": 590.0,
              "observations_in_window": 5,
              "pct_change": 404.27,
              "start_date": "2026-02-28",
              "start_price": 117.0,
              "window_days": null
            }
          }
        },
        "lab": {
          "distinct_days": 0,
          "observation_count": 0,
          "windows": {
            "1y": null,
            "30d": null,
            "7d": null,
            "90d": null,
            "all_time": null
          }
        },
        "retail": {
          "distinct_days": 2,
          "observation_count": 12,
          "windows": {
            "1y": {
              "abs_change": 1261.0,
              "actual_span_days": 14,
              "confidence": "low",
              "confidence_note": "Based on 12 observation(s) across 2 distinct day(s), spanning 14 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-29",
              "end_price": 1368.5,
              "observations_in_window": 12,
              "pct_change": 1173.02,
              "start_date": "2026-03-15",
              "start_price": 107.5,
              "window_days": 365
            },
            "30d": {
              "abs_change": 1261.0,
              "actual_span_days": 14,
              "confidence": "low",
              "confidence_note": "Based on 12 observation(s) across 2 distinct day(s), spanning 14 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-29",
              "end_price": 1368.5,
              "observations_in_window": 12,
              "pct_change": 1173.02,
              "start_date": "2026-03-15",
              "start_price": 107.5,
              "window_days": 30
            },
            "7d": null,
            "90d": {
              "abs_change": 1261.0,
              "actual_span_days": 14,
              "confidence": "low",
              "confidence_note": "Based on 12 observation(s) across 2 distinct day(s), spanning 14 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-29",
              "end_price": 1368.5,
              "observations_in_window": 12,
              "pct_change": 1173.02,
              "start_date": "2026-03-15",
              "start_price": 107.5,
              "window_days": 90
            },
            "all_time": {
              "abs_change": 1261.0,
              "actual_span_days": 14,
              "confidence": "low",
              "confidence_note": "Based on 12 observation(s) across 2 distinct day(s), spanning 14 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-29",
              "end_price": 1368.5,
              "observations_in_window": 12,
              "pct_change": 1173.02,
              "start_date": "2026-03-15",
              "start_price": 107.5,
              "window_days": null
            }
          }
        }
      }
    },
    "Tm": {
      "data_quality": "moderate",
      "data_since": "2026-03-15",
      "data_until": "2026-03-30",
      "distinct_days": 3,
      "latest_bulk_price": {
        "contributing_observations": 1,
        "currency": "USD",
        "date": "2026-03-30",
        "form_summary": "oxide",
        "notes": "Median of 2 bulk offers (Chinese Direct Seller, Ganzhou Zhanhai)",
        "price_per_kg": 965.0,
        "source_type": "median_aggregate",
        "sources": [
          "Ganzhou Zhanhai"
        ]
      },
      "latest_lab_price": null,
      "latest_retail_price": {
        "contributing_observations": 10,
        "currency": "USD",
        "date": "2026-03-29",
        "form_summary": "metal, oxide",
        "notes": "Median of 12 retail offers (Alfa Aesar, Chemsavers, Edgetech Industries, MSE Supplies + 4 more)",
        "price_per_kg": 10959.5,
        "source_type": "median_aggregate",
        "sources": [
          "Alfa Aesar",
          "Chemsavers",
          "MSE Supplies",
          "PEGUYS",
          "RWMM",
          "Smart-Elements"
        ]
      },
      "observation_count": 14,
      "tiers": {
        "bulk": {
          "distinct_days": 2,
          "observation_count": 2,
          "windows": {
            "1y": {
              "abs_change": -1570.0,
              "actual_span_days": 1,
              "confidence": "low",
              "confidence_note": "Based on 2 observation(s) across 2 distinct day(s), spanning 1 day(s).",
              "direction": "down",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-30",
              "end_price": 180.0,
              "observations_in_window": 2,
              "pct_change": -89.71,
              "start_date": "2026-03-29",
              "start_price": 1750.0,
              "window_days": 365
            },
            "30d": {
              "abs_change": -1570.0,
              "actual_span_days": 1,
              "confidence": "low",
              "confidence_note": "Based on 2 observation(s) across 2 distinct day(s), spanning 1 day(s).",
              "direction": "down",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-30",
              "end_price": 180.0,
              "observations_in_window": 2,
              "pct_change": -89.71,
              "start_date": "2026-03-29",
              "start_price": 1750.0,
              "window_days": 30
            },
            "7d": {
              "abs_change": -1570.0,
              "actual_span_days": 1,
              "confidence": "low",
              "confidence_note": "Based on 2 observation(s) across 2 distinct day(s), spanning 1 day(s).",
              "direction": "down",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-30",
              "end_price": 180.0,
              "observations_in_window": 2,
              "pct_change": -89.71,
              "start_date": "2026-03-29",
              "start_price": 1750.0,
              "window_days": 7
            },
            "90d": {
              "abs_change": -1570.0,
              "actual_span_days": 1,
              "confidence": "low",
              "confidence_note": "Based on 2 observation(s) across 2 distinct day(s), spanning 1 day(s).",
              "direction": "down",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-30",
              "end_price": 180.0,
              "observations_in_window": 2,
              "pct_change": -89.71,
              "start_date": "2026-03-29",
              "start_price": 1750.0,
              "window_days": 90
            },
            "all_time": {
              "abs_change": -1570.0,
              "actual_span_days": 1,
              "confidence": "low",
              "confidence_note": "Based on 2 observation(s) across 2 distinct day(s), spanning 1 day(s).",
              "direction": "down",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-30",
              "end_price": 180.0,
              "observations_in_window": 2,
              "pct_change": -89.71,
              "start_date": "2026-03-29",
              "start_price": 1750.0,
              "window_days": null
            }
          }
        },
        "lab": {
          "distinct_days": 0,
          "observation_count": 0,
          "windows": {
            "1y": null,
            "30d": null,
            "7d": null,
            "90d": null,
            "all_time": null
          }
        },
        "retail": {
          "distinct_days": 2,
          "observation_count": 12,
          "windows": {
            "1y": {
              "abs_change": 15300.0,
              "actual_span_days": 14,
              "confidence": "low",
              "confidence_note": "Based on 12 observation(s) across 2 distinct day(s), spanning 14 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-29",
              "end_price": 18300.0,
              "observations_in_window": 12,
              "pct_change": 510.0,
              "start_date": "2026-03-15",
              "start_price": 3000.0,
              "window_days": 365
            },
            "30d": {
              "abs_change": 15300.0,
              "actual_span_days": 14,
              "confidence": "low",
              "confidence_note": "Based on 12 observation(s) across 2 distinct day(s), spanning 14 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-29",
              "end_price": 18300.0,
              "observations_in_window": 12,
              "pct_change": 510.0,
              "start_date": "2026-03-15",
              "start_price": 3000.0,
              "window_days": 30
            },
            "7d": null,
            "90d": {
              "abs_change": 15300.0,
              "actual_span_days": 14,
              "confidence": "low",
              "confidence_note": "Based on 12 observation(s) across 2 distinct day(s), spanning 14 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-29",
              "end_price": 18300.0,
              "observations_in_window": 12,
              "pct_change": 510.0,
              "start_date": "2026-03-15",
              "start_price": 3000.0,
              "window_days": 90
            },
            "all_time": {
              "abs_change": 15300.0,
              "actual_span_days": 14,
              "confidence": "low",
              "confidence_note": "Based on 12 observation(s) across 2 distinct day(s), spanning 14 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-29",
              "end_price": 18300.0,
              "observations_in_window": 12,
              "pct_change": 510.0,
              "start_date": "2026-03-15",
              "start_price": 3000.0,
              "window_days": null
            }
          }
        }
      }
    },
    "V": {
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      "data_since": "2026-03-15",
      "data_until": "2026-03-30",
      "distinct_days": 3,
      "latest_bulk_price": {
        "contributing_observations": 1,
        "currency": "USD",
        "date": "2026-03-30",
        "form_summary": "oxide",
        "notes": "Median of 3 bulk offers (Alibaba (multiple CN suppliers), Fastmarkets (Europe), Fastmarkets (Rotterdam))",
        "price_per_kg": 24.0,
        "source_type": "median_aggregate",
        "sources": [
          "Fastmarkets (Rotterdam)"
        ]
      },
      "latest_lab_price": null,
      "latest_retail_price": {
        "contributing_observations": 10,
        "currency": "USD",
        "date": "2026-03-29",
        "form_summary": "metal, oxide",
        "notes": "Median of 13 retail offers (ALB Materials, Alfa Aesar, Chemsavers, Edgetech Industries + 6 more)",
        "price_per_kg": 1530.0,
        "source_type": "median_aggregate",
        "sources": [
          "Alfa Aesar",
          "Chemsavers",
          "MSE Supplies",
          "Metallos.de",
          "PEGUYS",
          "RWMM",
          "Smart-Elements"
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      },
      "observation_count": 16,
      "tiers": {
        "bulk": {
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          "observation_count": 3,
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              "abs_change": -295.0,
              "actual_span_days": 1,
              "confidence": "low",
              "confidence_note": "Based on 3 observation(s) across 2 distinct day(s), spanning 1 day(s).",
              "direction": "down",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-30",
              "end_price": 12.0,
              "observations_in_window": 3,
              "pct_change": -96.09,
              "start_date": "2026-03-29",
              "start_price": 307.0,
              "window_days": 365
            },
            "30d": {
              "abs_change": -295.0,
              "actual_span_days": 1,
              "confidence": "low",
              "confidence_note": "Based on 3 observation(s) across 2 distinct day(s), spanning 1 day(s).",
              "direction": "down",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-30",
              "end_price": 12.0,
              "observations_in_window": 3,
              "pct_change": -96.09,
              "start_date": "2026-03-29",
              "start_price": 307.0,
              "window_days": 30
            },
            "7d": {
              "abs_change": -295.0,
              "actual_span_days": 1,
              "confidence": "low",
              "confidence_note": "Based on 3 observation(s) across 2 distinct day(s), spanning 1 day(s).",
              "direction": "down",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-30",
              "end_price": 12.0,
              "observations_in_window": 3,
              "pct_change": -96.09,
              "start_date": "2026-03-29",
              "start_price": 307.0,
              "window_days": 7
            },
            "90d": {
              "abs_change": -295.0,
              "actual_span_days": 1,
              "confidence": "low",
              "confidence_note": "Based on 3 observation(s) across 2 distinct day(s), spanning 1 day(s).",
              "direction": "down",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-30",
              "end_price": 12.0,
              "observations_in_window": 3,
              "pct_change": -96.09,
              "start_date": "2026-03-29",
              "start_price": 307.0,
              "window_days": 90
            },
            "all_time": {
              "abs_change": -295.0,
              "actual_span_days": 1,
              "confidence": "low",
              "confidence_note": "Based on 3 observation(s) across 2 distinct day(s), spanning 1 day(s).",
              "direction": "down",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-30",
              "end_price": 12.0,
              "observations_in_window": 3,
              "pct_change": -96.09,
              "start_date": "2026-03-29",
              "start_price": 307.0,
              "window_days": null
            }
          }
        },
        "lab": {
          "distinct_days": 0,
          "observation_count": 0,
          "windows": {
            "1y": null,
            "30d": null,
            "7d": null,
            "90d": null,
            "all_time": null
          }
        },
        "retail": {
          "distinct_days": 2,
          "observation_count": 13,
          "windows": {
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              "abs_change": 2331.0,
              "actual_span_days": 14,
              "confidence": "low",
              "confidence_note": "Based on 13 observation(s) across 2 distinct day(s), spanning 14 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-29",
              "end_price": 2345.0,
              "observations_in_window": 13,
              "pct_change": 16650.0,
              "start_date": "2026-03-15",
              "start_price": 14.0,
              "window_days": 365
            },
            "30d": {
              "abs_change": 2331.0,
              "actual_span_days": 14,
              "confidence": "low",
              "confidence_note": "Based on 13 observation(s) across 2 distinct day(s), spanning 14 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-29",
              "end_price": 2345.0,
              "observations_in_window": 13,
              "pct_change": 16650.0,
              "start_date": "2026-03-15",
              "start_price": 14.0,
              "window_days": 30
            },
            "7d": null,
            "90d": {
              "abs_change": 2331.0,
              "actual_span_days": 14,
              "confidence": "low",
              "confidence_note": "Based on 13 observation(s) across 2 distinct day(s), spanning 14 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-29",
              "end_price": 2345.0,
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              "pct_change": 16650.0,
              "start_date": "2026-03-15",
              "start_price": 14.0,
              "window_days": 90
            },
            "all_time": {
              "abs_change": 2331.0,
              "actual_span_days": 14,
              "confidence": "low",
              "confidence_note": "Based on 13 observation(s) across 2 distinct day(s), spanning 14 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-03-29",
              "end_price": 2345.0,
              "observations_in_window": 13,
              "pct_change": 16650.0,
              "start_date": "2026-03-15",
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              "window_days": null
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          }
        }
      }
    },
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      "data_since": "2026-03-15",
      "data_until": "2026-03-15",
      "distinct_days": 1,
      "latest_bulk_price": null,
      "latest_lab_price": null,
      "latest_retail_price": {
        "contributing_observations": 4,
        "currency": "USD",
        "date": "2026-03-15",
        "form_summary": "powder",
        "notes": "Median of 4 retail offers (ALB Materials, American Elements, Edgetech Industries, Stanford Advanced Materials)",
        "price_per_kg": 54.0,
        "source_type": "median_aggregate",
        "sources": [
          "alb-materials-01",
          "american-elements-01",
          "edgetech-industries-01",
          "stanford-advanced-materials-01"
        ]
      },
      "observation_count": 4,
      "tiers": {
        "bulk": {
          "distinct_days": 0,
          "observation_count": 0,
          "windows": {
            "1y": null,
            "30d": null,
            "7d": null,
            "90d": null,
            "all_time": null
          }
        },
        "lab": {
          "distinct_days": 0,
          "observation_count": 0,
          "windows": {
            "1y": null,
            "30d": null,
            "7d": null,
            "90d": null,
            "all_time": null
          }
        },
        "retail": {
          "distinct_days": 1,
          "observation_count": 4,
          "windows": {
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            "30d": null,
            "7d": null,
            "90d": null,
            "all_time": null
          }
        }
      }
    },
    "Y": {
      "data_quality": "moderate",
      "data_since": "2026-03-15",
      "data_until": "2026-04-04",
      "distinct_days": 2,
      "latest_bulk_price": null,
      "latest_lab_price": null,
      "latest_retail_price": {
        "contributing_observations": 2,
        "currency": "USD",
        "date": "2026-04-04",
        "form_summary": "metal, oxide",
        "notes": "Median of 5 retail offers (ALB Materials, Edgetech Industries, Stanford Advanced Materials, novaelements (eBay) + 1 more)",
        "price_per_kg": 10.0,
        "source_type": "median_aggregate",
        "sources": [
          "novaelements (eBay)",
          "snaucke-elements (eBay)"
        ]
      },
      "observation_count": 5,
      "tiers": {
        "bulk": {
          "distinct_days": 0,
          "observation_count": 0,
          "windows": {
            "1y": null,
            "30d": null,
            "7d": null,
            "90d": null,
            "all_time": null
          }
        },
        "lab": {
          "distinct_days": 0,
          "observation_count": 0,
          "windows": {
            "1y": null,
            "30d": null,
            "7d": null,
            "90d": null,
            "all_time": null
          }
        },
        "retail": {
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          "observation_count": 5,
          "windows": {
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              "abs_change": 9267.0,
              "actual_span_days": 20,
              "confidence": "low",
              "confidence_note": "Based on 5 observation(s) across 2 distinct day(s), spanning 20 day(s).",
              "direction": "up",
              "distinct_days_in_window": 2,
              "end_date": "2026-04-04",
              "end_price": 9275.0,
              "observations_in_window": 5,
              "pct_change": 115837.5,
              "start_date": "2026-03-15",
              "start_price": 8.0,
              "window_days": 365
            },
            "30d": {
              "abs_change": 9267.0,
              "actual_span_days": 20,
              "confidence": "low",
              "confidence_note": "Based on 5 observation(s) across 2 distinct day(s), spanning 20 day(s).",
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              "distinct_days_in_window": 2,
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