{
  "schema_version": 1,
  "identifier": "powertotals-emi-2026-03",
  "name": "Electrical Materials Index",
  "short_name": "EMI",
  "description": "A monthly composite of published US electrical material, equipment, and construction wage series.",
  "period": "2026-03",
  "base_period": "2026-01",
  "base_value": 100,
  "value": 101.52,
  "month_over_month_change": 0.36,
  "change_from_base": 1.52,
  "published_at": "2026-08-15T14:13:41.166Z",
  "degraded": true,
  "missing_weight": 0.15,
  "missing_components": [
    {
      "id": "electrical-equipment",
      "label": "Electrical equipment manufacturing",
      "series_id": "PCU3353 3353",
      "weight": 0.15,
      "critical": false,
      "missing_since": "2026-08-15",
      "candidate": {
        "series_id": "PCU33533353",
        "title": "Producer Price Index by Industry: Electrical Equipment Manufacturing",
        "reason": "Exact live FRED catalog title match; operator confirmation required before activation."
      }
    }
  ],
  "degradation_notice": "Published with available components reweighted proportionally. Missing since Electrical equipment manufacturing: 2026-08-15.",
  "revision_note": null,
  "source_revisions": [],
  "formula": "35% × Copper wire and cable + 15% × Steel mill products + 20% × Transformer manufacturing + 15% × Electrical equipment manufacturing + 15% × Construction average hourly wage",
  "components": {
    "copper-wire": {
      "label": "Copper wire and cable",
      "series_id": "WPU10260314",
      "source": "bls-api",
      "configured_weight": 0.35,
      "effective_weight": 0.411765,
      "base_value": 530.917,
      "current_value": 536.77,
      "normalized_value": 101.102
    },
    "steel": {
      "label": "Steel mill products",
      "series_id": "WPU1017",
      "source": "bls-api",
      "configured_weight": 0.15,
      "effective_weight": 0.176471,
      "base_value": 315.369,
      "current_value": 331.357,
      "normalized_value": 105.07
    },
    "transformers": {
      "label": "Transformer manufacturing",
      "series_id": "PCU335311335311",
      "source": "bls-api",
      "configured_weight": 0.2,
      "effective_weight": 0.235294,
      "base_value": 455.931,
      "current_value": 455.996,
      "normalized_value": 100.014
    },
    "construction-wage": {
      "label": "Construction average hourly wage",
      "series_id": "CES2000000003",
      "source": "bls-api",
      "configured_weight": 0.15,
      "effective_weight": 0.176471,
      "base_value": 40.53,
      "current_value": 40.92,
      "normalized_value": 100.962
    }
  },
  "license": "https://creativecommons.org/licenses/by/4.0/"
}