{
  "schema_version": 1,
  "identifier": "materialtotals-cmi-2026-03",
  "name": "Construction Materials Index",
  "short_name": "CMI",
  "description": "A monthly composite of published US construction material producer price series.",
  "period": "2026-03",
  "base_period": "2026-01",
  "base_value": 100,
  "value": 100.88,
  "month_over_month_change": 0.07,
  "change_from_base": 0.88,
  "published_at": "2026-08-15T14:13:41.155Z",
  "degraded": true,
  "missing_weight": 0.1,
  "missing_components": [
    {
      "id": "finished-inputs",
      "label": "Finished construction inputs",
      "series_id": "PPIFIS",
      "weight": 0.1,
      "critical": false,
      "missing_since": "2026-08-15",
      "candidate": {
        "series_id": "WPUIP2300001",
        "title": "Producer Price Index by Commodity: Inputs to Industries: Net Inputs to Construction Industries, Goods",
        "reason": "Exact live FRED catalog match; operator confirmation required before activation."
      }
    }
  ],
  "degradation_notice": "Published with available components reweighted proportionally. Missing since Finished construction inputs: 2026-08-15.",
  "revision_note": null,
  "source_revisions": [],
  "formula": "20% × Lumber + 20% × Cement manufacturing + 15% × Gypsum products + 20% × Steel mill products + 15% × Concrete products + 10% × Finished construction inputs",
  "components": {
    "lumber": {
      "label": "Lumber",
      "series_id": "WPS081",
      "source": "bls-api",
      "configured_weight": 0.2,
      "effective_weight": 0.222222,
      "base_value": 263.733,
      "current_value": 260.111,
      "normalized_value": 98.627
    },
    "cement": {
      "label": "Cement manufacturing",
      "series_id": "PCU327310327310",
      "source": "bls-api",
      "configured_weight": 0.2,
      "effective_weight": 0.222222,
      "base_value": 352.183,
      "current_value": 352.739,
      "normalized_value": 100.158
    },
    "gypsum": {
      "label": "Gypsum products",
      "series_id": "WPU137",
      "source": "bls-api",
      "configured_weight": 0.15,
      "effective_weight": 0.166667,
      "base_value": 480.334,
      "current_value": 479.517,
      "normalized_value": 99.83
    },
    "steel": {
      "label": "Steel mill products",
      "series_id": "WPU1017",
      "source": "bls-api",
      "configured_weight": 0.2,
      "effective_weight": 0.222222,
      "base_value": 315.369,
      "current_value": 331.357,
      "normalized_value": 105.07
    },
    "concrete": {
      "label": "Concrete products",
      "series_id": "WPU132",
      "source": "bls-api",
      "configured_weight": 0.15,
      "effective_weight": 0.166667,
      "base_value": 470.619,
      "current_value": 472.198,
      "normalized_value": 100.336
    }
  },
  "license": "https://creativecommons.org/licenses/by/4.0/"
}