{
  "id": "R59",
  "reviewed": "2026-10-03",
  "status": "REVIEW_REQUIRED",
  "scope": "Same Yahoo provider daily timestamp/cutoff-normalized adjclose and independent Decimal50 dividend-multiplier arithmetic; NOT independent prices/issuer-event/full-split audit",
  "cutoff": "2026-09-21",
  "tolerance_usd": "0.001",
  "source_sha256": "34d709809fe2197dfdd20c2e9439da06fc7f67b15f97574a25d7e7f6de574a84",
  "daily_observations": 27864,
  "monthly_observations": 1334,
  "dividend_events_recorded": 502,
  "split_events_recorded": 2,
  "summary": [
    {
      "ticker": "VOO",
      "daily_observations": 4032,
      "months_compared": 193,
      "mismatched_months": 0,
      "maximum_absolute_difference_usd": "0.00016415773781711356836558346295490340770761902",
      "first_observation": "2010-09-09",
      "last_observation": "2026-09-21",
      "dividend_events": 63,
      "split_events_recorded_not_independently_validated": 1,
      "first_day_dividend_with_no_inrange_prior_close": [],
      "maximum_decimal_vs_provider_difference_usd": "0.00016195723554519784585117141410866140434343395",
      "status": "SAME_PROVIDER_WITHIN_TOLERANCE"
    },
    {
      "ticker": "QQQ",
      "daily_observations": 4037,
      "months_compared": 193,
      "mismatched_months": 192,
      "maximum_absolute_difference_usd": "0.7676884765625",
      "first_observation": "2010-09-01",
      "last_observation": "2026-09-21",
      "dividend_events": 67,
      "split_events_recorded_not_independently_validated": 0,
      "first_day_dividend_with_no_inrange_prior_close": [],
      "maximum_decimal_vs_provider_difference_usd": "0.00013852178620422256725656564732242019387506676",
      "status": "REVIEW_REQUIRED"
    },
    {
      "ticker": "SCHD",
      "daily_observations": 3750,
      "months_compared": 180,
      "mismatched_months": 0,
      "maximum_absolute_difference_usd": "0.000053258806248609110379834166512871151768082591",
      "first_observation": "2011-10-20",
      "last_observation": "2026-09-21",
      "dividend_events": 59,
      "split_events_recorded_not_independently_validated": 1,
      "first_day_dividend_with_no_inrange_prior_close": [],
      "maximum_decimal_vs_provider_difference_usd": "0.000008564539919403238366099757853073804327154771",
      "status": "SAME_PROVIDER_WITHIN_TOLERANCE"
    },
    {
      "ticker": "VTI",
      "daily_observations": 4037,
      "months_compared": 193,
      "mismatched_months": 0,
      "maximum_absolute_difference_usd": "0.00009101199600470454545729903659172559038449647",
      "first_observation": "2010-09-01",
      "last_observation": "2026-09-21",
      "dividend_events": 64,
      "split_events_recorded_not_independently_validated": 0,
      "first_day_dividend_with_no_inrange_prior_close": [],
      "maximum_decimal_vs_provider_difference_usd": "0.00011846874980257742493510024711712266379118687",
      "status": "SAME_PROVIDER_WITHIN_TOLERANCE"
    },
    {
      "ticker": "VXUS",
      "daily_observations": 3934,
      "months_compared": 189,
      "mismatched_months": 0,
      "maximum_absolute_difference_usd": "0.000061431884766",
      "first_observation": "2011-01-28",
      "last_observation": "2026-09-21",
      "dividend_events": 58,
      "split_events_recorded_not_independently_validated": 0,
      "first_day_dividend_with_no_inrange_prior_close": [],
      "maximum_decimal_vs_provider_difference_usd": "0.000025208100075488471862401773389077749891870063",
      "status": "SAME_PROVIDER_WITHIN_TOLERANCE"
    },
    {
      "ticker": "BND",
      "daily_observations": 4037,
      "months_compared": 193,
      "mismatched_months": 0,
      "maximum_absolute_difference_usd": "0.000099215654211133010608799111662737834865016404",
      "first_observation": "2010-09-01",
      "last_observation": "2026-09-21",
      "dividend_events": 191,
      "split_events_recorded_not_independently_validated": 0,
      "first_day_dividend_with_no_inrange_prior_close": [
        "2010-09-01"
      ],
      "maximum_decimal_vs_provider_difference_usd": "0.000059566309621625364405278765375231439174201886",
      "status": "SAME_PROVIDER_WITHIN_TOLERANCE"
    },
    {
      "ticker": "GLD",
      "daily_observations": 4037,
      "months_compared": 193,
      "mismatched_months": 0,
      "maximum_absolute_difference_usd": "0.0000146484375",
      "first_observation": "2010-09-01",
      "last_observation": "2026-09-21",
      "dividend_events": 0,
      "split_events_recorded_not_independently_validated": 0,
      "first_day_dividend_with_no_inrange_prior_close": [],
      "maximum_decimal_vs_provider_difference_usd": "0E-14",
      "status": "SAME_PROVIDER_WITHIN_TOLERANCE"
    }
  ],
  "qqq_diagnostic": {
    "provider_event_date": "2026-09-21",
    "provider_rounded_distribution_usd": "0.751",
    "preceding_provider_close_usd": "721.4500122070312",
    "dividend_multiplier": "0.9989590408381828553139202077",
    "maximum_residual_after_diagnostic_multiplier_usd": "0.0001646527083994946155482",
    "interpretation": "Difference is consistent with that provider event adjustment, not proof of original collection timing/cause or issuer distribution accuracy; no original data edited"
  },
  "limitations": [
    "Fresh daily response does not recreate or certify the original snapshot response",
    "Adjusted history is rescaled at the cutoff because subsequent distributions can change all prior levels; current live quote metadata is not a historical close",
    "Provider quote close and event amounts already reflect its split convention; split ratios are recorded, not independently audited or reapplied",
    "QQQ192 month mismatches remain unresolved; historical published figures and engine inputs are retained and prominently marked for review",
    "Same-provider consistency of6 ETFs is not independent market data accuracy or actual investor return",
    "Original dataset contains100 series; only7 supported ETF series are covered",
    "No issuer-certified dividend precision, original vendor revision timing, real execution/tax/field performance or external review assurance"
  ],
  "provider_data_urls": [
    "https://query1.finance.yahoo.com/v8/finance/chart/VOO?period1=1283299200&period2=1790035200&interval=1d&events=div%2Csplits&includeAdjustedClose=true",
    "https://query1.finance.yahoo.com/v8/finance/chart/QQQ?period1=1283299200&period2=1790035200&interval=1d&events=div%2Csplits&includeAdjustedClose=true",
    "https://query1.finance.yahoo.com/v8/finance/chart/SCHD?period1=1283299200&period2=1790035200&interval=1d&events=div%2Csplits&includeAdjustedClose=true",
    "https://query1.finance.yahoo.com/v8/finance/chart/VTI?period1=1283299200&period2=1790035200&interval=1d&events=div%2Csplits&includeAdjustedClose=true",
    "https://query1.finance.yahoo.com/v8/finance/chart/VXUS?period1=1283299200&period2=1790035200&interval=1d&events=div%2Csplits&includeAdjustedClose=true",
    "https://query1.finance.yahoo.com/v8/finance/chart/BND?period1=1283299200&period2=1790035200&interval=1d&events=div%2Csplits&includeAdjustedClose=true",
    "https://query1.finance.yahoo.com/v8/finance/chart/GLD?period1=1283299200&period2=1790035200&interval=1d&events=div%2Csplits&includeAdjustedClose=true"
  ]
}