{
  "schemaVersion": 2,
  "coverageStart": "2010-09",
  "snapshotAsOf": "2026-08-07",
  "methodology": "Consecutive UTC month-end closes. Early history is a rounded multi-market consensus reference; completed recent months are progressively frozen from Binance BTCUSDT UTC daily closes by an automated monthly refresh.",
  "validationSource": "https://charts.bitcoin.com/returns-seasonality.html",
  "rows": [
    {
      "year": 2010,
      "months": [
        null,
        null,
        null,
        null,
        null,
        null,
        null,
        null,
        -14,
        217,
        47,
        7
      ]
    },
    {
      "year": 2011,
      "months": [
        60,
        100,
        -17,
        281,
        199,
        90,
        -19,
        -35,
        -46,
        -27,
        -17,
        50
      ]
    },
    {
      "year": 2012,
      "months": [
        26,
        -11,
        -2,
        3,
        3,
        29,
        38,
        18,
        14,
        -13,
        15,
        8
      ]
    },
    {
      "year": 2013,
      "months": [
        48,
        55,
        196,
        46,
        -5,
        -25,
        16,
        25,
        -4,
        55,
        453,
        -33
      ]
    },
    {
      "year": 2014,
      "months": [
        8,
        -31,
        -19,
        -3,
        39,
        3,
        -9,
        -18,
        -19,
        -13,
        12,
        -16
      ]
    },
    {
      "year": 2015,
      "months": [
        -31,
        16,
        -4,
        -3,
        -3,
        14,
        8,
        -19,
        3,
        32,
        21,
        14
      ]
    },
    {
      "year": 2016,
      "months": [
        -15,
        19,
        -5,
        8,
        18,
        27,
        -7,
        -8,
        6,
        15,
        6,
        31
      ]
    },
    {
      "year": 2017,
      "months": [
        0,
        23,
        -9,
        26,
        69,
        7,
        16,
        65,
        -9,
        48,
        58,
        41
      ]
    },
    {
      "year": 2018,
      "months": [
        -30,
        5,
        -34,
        34,
        -20,
        -15,
        27,
        -12,
        -6,
        -4,
        -35,
        -9
      ]
    },
    {
      "year": 2019,
      "months": [
        -8,
        11,
        8,
        28,
        61,
        35,
        -14,
        -2,
        -15,
        12,
        -17,
        -6
      ]
    },
    {
      "year": 2020,
      "months": [
        31,
        -9,
        -26,
        35,
        10,
        -4,
        23,
        4,
        -7,
        26,
        39,
        53
      ]
    },
    {
      "year": 2021,
      "months": [
        16,
        36,
        28,
        -5,
        -34,
        -3,
        17,
        13,
        -9,
        44,
        -7,
        -19
      ]
    },
    {
      "year": 2022,
      "months": [
        -18,
        6,
        14,
        -18,
        -17,
        -37,
        17,
        -15,
        -2,
        5,
        -18,
        -1
      ]
    },
    {
      "year": 2023,
      "months": [
        39,
        1,
        22,
        3,
        -6,
        11,
        -4,
        -10,
        2,
        28,
        9,
        12
      ]
    },
    {
      "year": 2024,
      "months": [
        1,
        44,
        15,
        -13,
        10,
        -8,
        4,
        -9,
        8,
        11,
        37,
        -4
      ]
    },
    {
      "year": 2025,
      "months": [
        11,
        -18,
        -2,
        14,
        11,
        3,
        8,
        -7,
        5,
        -4,
        -17,
        -3
      ]
    },
    {
      "year": 2026,
      "months": [
        -5,
        -22,
        1,
        14,
        -3,
        -18,
        7.272,
        null,
        null,
        null,
        null,
        null
      ]
    }
  ],
  "automatedRefresh": {
    "schedule": "02:17 UTC on days 2 and 3 of each month (day 3 is a safety retry)",
    "source": "Binance Data Vision BTCUSDT spot 1d archive",
    "target": "previous completed UTC calendar month",
    "integrity": "Binance .CHECKSUM SHA-256 verified before use",
    "initialSeed": "2026-07 was initially seeded from a public cross-check; the first Binance Data Vision archive run recalculated it to +7.272% before a legacy validation-format assertion blocked the automated commit.",
    "initialSeedSource": "https://www.statmuse.com/money/ask/bitcoin-returns-monthly-2026",
    "completedThrough": "2026-07",
    "lastUpdatedAt": "2026-08-07T08:05:01Z",
    "officialRecovery": "2026-07 promoted from the checksum-verified Binance Data Vision archive run after the validation assertion was corrected in r9.12.2."
  },
  "officialMonths": [
    "2026-07"
  ],
  "seededMonths": []
}