{
  "checkedAt": "2026-10-04",
  "notionalUsd": 10000,
  "calculation": "Constant 10,000 USDT notional, settled rates only; positive = long pays; short has opposite sign; no compounding. Timestamp milliseconds normalized to seconds.",
  "samples": [
    {
      "timestamp": "2026-09-25T00:00:00+00:00",
      "bybit": 2.517e-05,
      "okx": -3.7995722708e-06,
      "binance": 2.14e-06
    },
    {
      "timestamp": "2026-09-25T08:00:00+00:00",
      "bybit": -1.34e-06,
      "okx": 7.18624451426e-05,
      "binance": 3.512e-05
    },
    {
      "timestamp": "2026-09-25T16:00:00+00:00",
      "bybit": -5.33e-06,
      "okx": 3.41625964238e-05,
      "binance": -5.74e-06
    },
    {
      "timestamp": "2026-09-26T00:00:00+00:00",
      "bybit": 1.043e-05,
      "okx": 1.70028374203e-05,
      "binance": 7.69e-06
    },
    {
      "timestamp": "2026-09-26T08:00:00+00:00",
      "bybit": 2.446e-05,
      "okx": 2.0707330059e-05,
      "binance": 4.93e-05
    },
    {
      "timestamp": "2026-09-26T16:00:00+00:00",
      "bybit": -1.027e-05,
      "okx": -5.5621777386e-06,
      "binance": -5.45e-06
    },
    {
      "timestamp": "2026-09-27T00:00:00+00:00",
      "bybit": 4.892e-05,
      "okx": -8.7510286654e-06,
      "binance": 4.703e-05
    },
    {
      "timestamp": "2026-09-27T08:00:00+00:00",
      "bybit": 2.285e-05,
      "okx": -1.81443987004e-05,
      "binance": 1.449e-05
    },
    {
      "timestamp": "2026-09-27T16:00:00+00:00",
      "bybit": 3.647e-05,
      "okx": -1.07439144441e-05,
      "binance": 1.051e-05
    },
    {
      "timestamp": "2026-09-28T00:00:00+00:00",
      "bybit": 9.62e-06,
      "okx": 4.59235224734e-05,
      "binance": 1.987e-05
    },
    {
      "timestamp": "2026-09-28T08:00:00+00:00",
      "bybit": -2.442e-05,
      "okx": -7.6067766736e-06,
      "binance": -2.585e-05
    },
    {
      "timestamp": "2026-09-28T16:00:00+00:00",
      "bybit": 4.941e-05,
      "okx": 7.09507874477e-05,
      "binance": 6.501e-05
    },
    {
      "timestamp": "2026-09-29T00:00:00+00:00",
      "bybit": 2.97e-05,
      "okx": 5.43754330817e-05,
      "binance": 3.836e-05
    },
    {
      "timestamp": "2026-09-29T08:00:00+00:00",
      "bybit": 2.815e-05,
      "okx": 2.54900915325e-05,
      "binance": 6.798e-05
    },
    {
      "timestamp": "2026-09-29T16:00:00+00:00",
      "bybit": -3.98e-06,
      "okx": 3.29384702947e-05,
      "binance": 1.399e-05
    },
    {
      "timestamp": "2026-09-30T00:00:00+00:00",
      "bybit": 6.254e-05,
      "okx": 0.0001,
      "binance": 7.697e-05
    },
    {
      "timestamp": "2026-09-30T08:00:00+00:00",
      "bybit": -3.97e-06,
      "okx": 3.37200721784e-05,
      "binance": -2.44e-06
    },
    {
      "timestamp": "2026-09-30T16:00:00+00:00",
      "bybit": 5.495e-05,
      "okx": 3.67519063153e-05,
      "binance": 6.606e-05
    },
    {
      "timestamp": "2026-10-01T00:00:00+00:00",
      "bybit": 4.076e-05,
      "okx": 5.30190324008e-05,
      "binance": 7.981e-05
    },
    {
      "timestamp": "2026-10-01T08:00:00+00:00",
      "bybit": 4.127e-05,
      "okx": 2.10721559119e-05,
      "binance": 4.568e-05
    },
    {
      "timestamp": "2026-10-01T16:00:00+00:00",
      "bybit": 5.283e-05,
      "okx": 6.2504860528e-05,
      "binance": 6.98e-05
    },
    {
      "timestamp": "2026-10-02T00:00:00+00:00",
      "bybit": 5.235e-05,
      "okx": 3.2181372956e-06,
      "binance": 2.693e-05
    },
    {
      "timestamp": "2026-10-02T08:00:00+00:00",
      "bybit": 0.0001,
      "okx": 7.09670858217e-05,
      "binance": 0.0001
    },
    {
      "timestamp": "2026-10-02T16:00:00+00:00",
      "bybit": 0.0001,
      "okx": 4.62739056724e-05,
      "binance": 1.214e-05
    },
    {
      "timestamp": "2026-10-03T00:00:00+00:00",
      "bybit": -4.579e-05,
      "okx": -9.370733822e-07,
      "binance": 4.574e-05
    },
    {
      "timestamp": "2026-10-03T08:00:00+00:00",
      "bybit": -3.42e-05,
      "okx": 3.0987742263e-05,
      "binance": 3.61e-06
    },
    {
      "timestamp": "2026-10-03T16:00:00+00:00",
      "bybit": -5.43e-06,
      "okx": 3.36322394985e-05,
      "binance": 4.528e-05
    },
    {
      "timestamp": "2026-10-04T00:00:00+00:00",
      "bybit": 2.04e-06,
      "okx": 2.79108236201e-05,
      "binance": -1.346e-05
    },
    {
      "timestamp": "2026-10-04T08:00:00+00:00",
      "bybit": 2.782e-05,
      "okx": 1.39230909643e-05,
      "binance": 3.451e-05
    },
    {
      "timestamp": "2026-10-04T16:00:00+00:00",
      "bybit": 5.489e-05,
      "okx": 4.79022334781e-05,
      "binance": 3.785e-05
    }
  ],
  "sources": {
    "binance": "https://fapi.binance.com/fapi/v1/fundingRate?symbol=BTCUSDT&limit=30",
    "bybit": "https://api.bybit.com/v5/market/funding/history?category=linear&symbol=BTCUSDT&limit=30",
    "okx": "https://www.okx.com/api/v5/public/funding-rate-history?instId=BTC-USDT-SWAP&limit=30"
  }
}