{
  "version": "v1.0",
  "base_date": "2026-06-07",
  "base_value": 100,
  "methodology": "Market-cap-weighted index of tokenized physical metals plus on-chain uranium concentrate. Exact maintainer rules and re-balancing logic are proprietary; composition list, base date and data source are public.",
  "data_source": "CoinGecko /coins/markets?category=tokenized-commodities + /coins/{id}/history",
  "weighting": "mcap-weighted",
  "secondary": {
    "name": "GMRI-EW",
    "weighting": "equal-weighted",
    "note": "Side metric showing breadth"
  },
  "exclusions": {
    "XAUT0": "Duplicate of XAUT (wrapped version)",
    "VEREM": "Non-metal (emerald)",
    "CPERR": "Tiny rStock derivative <$1M mcap, excluded for stability",
    "PPLTR": "Tiny rStock derivative <$1M mcap",
    "PALLR": "Tiny rStock derivative <$1M mcap",
    "GLDR": "Tiny rStock derivative <$1M mcap",
    "SLVR": "Tiny rStock derivative <$1M mcap"
  },
  "constituents": [
    { "id": "tether-gold", "symbol": "XAUT", "name": "Tether Gold", "metal": "gold" },
    { "id": "pax-gold", "symbol": "PAXG", "name": "PAX Gold", "metal": "gold" },
    { "id": "kinesis-gold", "symbol": "KAU", "name": "Kinesis Gold", "metal": "gold" },
    { "id": "kinesis-silver", "symbol": "KAG", "name": "Kinesis Silver", "metal": "silver" },
    { "id": "pleasing-gold", "symbol": "PGOLD", "name": "Pleasing Gold", "metal": "gold" },
    { "id": "matrixdock-gold", "symbol": "XAUM", "name": "Matrixdock Gold", "metal": "gold" },
    { "id": "goldfish-gold", "symbol": "GGBR", "name": "Goldfish Gold", "metal": "gold" },
    { "id": "streamex-gldy", "symbol": "GLDY", "name": "Streamex GLDY", "metal": "gold" },
    { "id": "uranium", "symbol": "XU3O8", "name": "Uranium³O₈", "metal": "uranium" },
    { "id": "gold-token-sa-dgld-tokenized-gold", "symbol": "DGLD", "name": "Gold Token SA DGLD", "metal": "gold" },
    { "id": "vnx-gold", "symbol": "VNXAU", "name": "VNX Gold", "metal": "gold" },
    { "id": "comtech-gold", "symbol": "CGO", "name": "Comtech Gold", "metal": "gold" },
    { "id": "matrixdock-silver", "symbol": "XAGM", "name": "Matrixdock Silver", "metal": "silver" },
    { "id": "gold-dao", "symbol": "GOLDAO", "name": "Gold DAO", "metal": "gold" },
    { "id": "kinka", "symbol": "XNK", "name": "Kinka", "metal": "gold" },
    { "id": "gold-token", "symbol": "GLDT", "name": "Gold Token", "metal": "gold" },
    { "id": "gold-fgld-finest-tokenized-gold", "symbol": "FGLD", "name": "fGLD", "metal": "gold" },
    { "id": "tenbin-gold", "symbol": "TGLD", "name": "Tenbin Gold", "metal": "gold" }
  ]
}