{
 "dataset": "Mulden ETF concentration",
 "canonical": "https://themulden.com/data/concentration/",
 "license": "CC BY 4.0",
 "source": "SEC Form N-PORT (NPORT-P) filings",
 "captured": "2026-09-01",
 "notCovered": [
  "SPY",
  "GLD",
  "AIEQ",
  "GLDM",
  "IAU",
  "IBIT",
  "IRBO",
  "SLV",
  "SPLG",
  "IQIN"
 ],
 "definitions": {
  "effectiveHoldings": "1 / sum of squared portfolio weights",
  "concentrationMultiple": "nominal holdings / effective holdings",
  "top10Pct": "share of net assets in the ten largest positions",
  "hhi": "Herfindahl-Hirschman index of portfolio weights"
 },
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