How far Coinbase's dollar close sits above or below Binance's tether close, in basis points (hundredths of a percent) — the gap also carries tether's own distance from a dollar (about −12 bp over the 7 days to Oct-25 2026). Bold line = 30-day average.
−12.6 bp BTC on Oct-25 2026, the last day in this build, measured and published by askthetape.com.
Same coin, two prices: what it closed at on Coinbase in dollars and on Binance in tether (USDT). The gap in basis points is the premium, and it also carries tether's own distance from a dollar — a few basis points in calm weeks, most of the gap in May 2022 and March 2023. We rebuilt it from the exchanges' own daily closes back to 2017 and extend it once a day at 05:55 UTC; nobody's index in between.
| leg | own rebuild: (Coinbase close / Binance close − 1) × 10,000 · Coinbase BTC-USD (dollars) against Binance BTCUSDT (tether) · daily archives of both venues |
|---|---|
| cadence | daily, forward cron 05:55Z |
| since | 2017-08-17 (BTC, ETH) |
| hourly window | data/premium_1h.parquet, our own hourly rebuild (prod cron 05:55Z, whole days) · since 2017-08-17 04:00Z by data, 80,376 hours with data inside a 80,572-hour span → 2026-10-26 07:00Z (in the browser on Tape and Desk the 1h window draws the newest 400 days of that and the max window every hour) · captured 2026-10-26T08:19:43Z |
| this build | data to Oct-25 2026 |
| policy | no backfill · read it here · export: whole history |
The chart itself is drawn in the browser: turn JavaScript on to hover a day, pick a window and draw your line. The numbers above come from the last build, Oct-26 2026 08:25Z.
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