{
  "policy": {
    "version": "commodity-expansion-equal-weight-v1",
    "stage": "research_only_not_live_policy",
    "cutoff": "2026-11-03",
    "long_start": "2007-05-30",
    "base": [
      "SPY",
      "TLT",
      "GLD",
      "BIL"
    ],
    "non_equity": [
      "TLT",
      "GLD",
      "BIL"
    ],
    "commodity_candidates": [
      "DBC",
      "PDBC",
      "COMT",
      "GSG",
      "DBA",
      "DBB",
      "DBO",
      "USO",
      "USL",
      "CPER",
      "SLV",
      "UNG"
    ],
    "standalone_returns": "Adjusted ETF total-return approximation, reinvested distributions, before external trading costs and investor taxes; do not compare spot oil price returns with futures ETF returns",
    "attribution": "Daily beginning-holding-value times total return, sum dollar P&L per sleeve. Rebalancing transfers are not P&L. Sum sleeve P&L minus fees must equal portfolio final NAV minus initial capital. Not sum of standalone CAGRs.",
    "non_equity_portfolio": "TLT/GLD/BIL each1/3, annual and monthly; distinct from their75% combined weight in original portfolio",
    "equal_addition": "For each passing candidate separately: SPY/TLT/GLD/BIL/new commodity each20%; monthly primary, annual sensitivity. Compare with four-asset 25% benchmark on exactly same dates.",
    "dilution_control": "For each candidate start period, compare weights SPY/TLT/GLD20% each and BIL40%, so the effect of introducing20% commodity can be separated from reducing original risky sleeves.",
    "additional_cases": {
      "six-equal-sectors": [
        "SPY",
        "TLT",
        "GLD",
        "BIL",
        "DBA",
        "DBB"
      ],
      "seven-equal-sectors": [
        "SPY",
        "TLT",
        "GLD",
        "BIL",
        "DBA",
        "DBB",
        "DBO"
      ],
      "five-class-commodity-basket": {
        "SPY": 0.2,
        "TLT": 0.2,
        "GLD": 0.2,
        "BIL": 0.2,
        "DBA": 0.06666666666666667,
        "DBB": 0.06666666666666667,
        "DBO": 0.06666666666666667
      }
    },
    "overlap": "Do not treat multiple broad commodity funds, oil funds, or overlapping commodity sectors as independent baskets. Broad funds already include energy/metals/agriculture and may overlap gold.",
    "cost_bps": 5,
    "cost_sensitivity_bps": [
      0,
      20
    ],
    "capital_usd": 100000,
    "leverage": 1,
    "optimization": "No retrospective weight optimizer or selecting only best historic commodity. Full candidate roster declared before returns computed, include failures.",
    "robustness": "Asset correlations and covariance risk shares, 2008/2020/2022 crises, retrospective halves where history>=10y, rolling10y. No synthetic pre-inception fund performance.",
    "execution": "Fractional total-return units, first US equity session of month/year at close, next returns earned after execution, no final liquidation fee",
    "limits": [
      "USD nominal before personal taxes and currency conversion",
      "ETF expenses/roll/commodity collateral realized effects already in return data; no double fee deduction",
      "Same-period comparisons required for recent funds",
      "Equal capital is not equal risk and commodity labels may overlap",
      "Single-vendor revised history; calendar and factor checks not independent daily certification",
      "Investor broker, residency, account permissions and commodity-pool taxation unresolved",
      "No production strategy change or trade authorization",
      "Not a stationary linear system; expected returns and covariance unknown/time-varying"
    ]
  },
  "availability": {
    "DBC": {
      "status": "preliminary_pass",
      "coverage": {
        "symbol": "DBC",
        "category": "broad commodities",
        "vendor_name": "Invesco DB Commodity Index Tracking Fund",
        "exchange": "NYSEArca",
        "currency": "USD",
        "timezone": "America/New_York",
        "last_success_at": "2026-11-04T15:51:22.502081+00:00",
        "last_full_at": "2026-11-04T15:38:56.627669+00:00",
        "last_error": null,
        "rows": 5220,
        "first_date": "2006-02-06",
        "last_date": "2026-11-04",
        "research_rows": 5219,
        "invalid_rows": 0,
        "review_rows": 0,
        "provisional_rows": 1,
        "last_research_date": "2026-11-03"
      },
      "start": "2007-05-30",
      "end": "2026-11-03"
    },
    "PDBC": {
      "status": "preliminary_pass",
      "coverage": {
        "symbol": "PDBC",
        "category": "diversified commodity futures active ETF; research only",
        "vendor_name": "Invesco Optimum Yield Diversified Commodity Strategy No K-1 ETF",
        "exchange": "NasdaqGM",
        "currency": "USD",
        "timezone": "America/New_York",
        "last_success_at": "2026-11-05T04:19:54.613666+00:00",
        "last_full_at": "2026-11-05T04:19:54.613666+00:00",
        "last_error": null,
        "rows": 3015,
        "first_date": "2014-11-07",
        "last_date": "2026-11-04",
        "research_rows": 3015,
        "invalid_rows": 0,
        "review_rows": 0,
        "provisional_rows": 0,
        "last_research_date": "2026-11-04"
      },
      "start": "2014-11-07",
      "end": "2026-11-03"
    },
    "COMT": {
      "status": "preliminary_pass",
      "coverage": {
        "symbol": "COMT",
        "category": "broad commodity futures dynamic roll ETF; research only",
        "vendor_name": "iShares GSCI Commodity Dynamic Roll Strategy ETF",
        "exchange": "NasdaqGM",
        "currency": "USD",
        "timezone": "America/New_York",
        "last_success_at": "2026-11-05T04:20:14.690721+00:00",
        "last_full_at": "2026-11-05T04:20:14.690721+00:00",
        "last_error": null,
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        "invalid_rows": 0,
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        "last_research_date": "2026-11-04"
      },
      "start": "2014-10-16",
      "end": "2026-11-03"
    },
    "GSG": {
      "status": "preliminary_pass",
      "coverage": {
        "symbol": "GSG",
        "category": "S&P GSCI broad commodity futures trust; research only",
        "vendor_name": "iShares S&P GSCI Commodity-Indexed Trust",
        "exchange": "NYSEArca",
        "currency": "USD",
        "timezone": "America/New_York",
        "last_success_at": "2026-11-05T04:20:31.291772+00:00",
        "last_full_at": "2026-11-05T04:20:31.291772+00:00",
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      "start": "2007-05-30",
      "end": "2026-11-03"
    },
    "DBA": {
      "status": "preliminary_pass",
      "coverage": {
        "symbol": "DBA",
        "category": "agriculture futures commodity pool; research only",
        "vendor_name": "Invesco DB Agriculture Fund",
        "exchange": "NYSEArca",
        "currency": "USD",
        "timezone": "America/New_York",
        "last_success_at": "2026-11-05T04:21:23.154702+00:00",
        "last_full_at": "2026-11-05T04:21:23.154702+00:00",
        "last_error": null,
        "rows": 4990,
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    },
    "DBB": {
      "status": "preliminary_pass",
      "coverage": {
        "symbol": "DBB",
        "category": "industrial metals futures commodity pool; research only",
        "vendor_name": "Invesco DB Base Metals Fund",
        "exchange": "NYSEArca",
        "currency": "USD",
        "timezone": "America/New_York",
        "last_success_at": "2026-11-05T04:21:45.352486+00:00",
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    "DBO": {
      "status": "preliminary_pass",
      "coverage": {
        "symbol": "DBO",
        "category": "WTI oil futures optimum yield commodity pool; research only",
        "vendor_name": "Invesco DB Oil Fund",
        "exchange": "NYSEArca",
        "currency": "USD",
        "timezone": "America/New_York",
        "last_success_at": "2026-11-05T04:22:10.458097+00:00",
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    "USO": {
      "status": "preliminary_pass",
      "coverage": {
        "symbol": "USO",
        "category": "WTI oil futures commodity pool; historical portfolio changes; research only",
        "vendor_name": "United States Oil Fund, LP",
        "exchange": "NYSEArca",
        "currency": "USD",
        "timezone": "America/New_York",
        "last_success_at": "2026-11-05T04:22:31.064356+00:00",
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    },
    "USL": {
      "status": "preliminary_pass",
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        "symbol": "USL",
        "category": "12-month WTI oil futures commodity pool; research only",
        "vendor_name": "United States 12 Month Oil Fund, LP",
        "exchange": "NYSEArca",
        "currency": "USD",
        "timezone": "America/New_York",
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    "CPER": {
      "status": "excluded_pending_review",
      "coverage": {
        "symbol": "CPER",
        "category": "copper futures commodity pool; research only",
        "vendor_name": "United States Copper Index Fund, LP",
        "exchange": "NYSEArca",
        "currency": "USD",
        "timezone": "America/New_York",
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      "reason": "Data audit failed: {\"symbols\": [\"CPER\"], \"start\": \"2011-11-15\", \"end\": \"2026-11-03\", \"sessions\": 3763, \"missing_or_unusable\": {\"CPER\": [\"2014-12-05\", \"2015-02-03\"]}, \"adjustment_residual_max_bps\": {\"CPER\": 0.0}}"
    },
    "SLV": {
      "status": "preliminary_pass",
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        "symbol": "SLV",
        "category": "physical silver trust; research only",
        "vendor_name": "iShares Silver Trust",
        "exchange": "NYSEArca",
        "currency": "USD",
        "timezone": "America/New_York",
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      "status": "preliminary_pass",
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        "symbol": "UNG",
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        "vendor_name": "United States Natural Gas Fund, LP",
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