Eight years of how far USDC and USDT drift from each other on Binance, in basis points of a dollar — including the hours nobody was watching — and four markets polled every 10 minutes since July 2026.
+11.7 bp furthest hourly close of the day · above 0 USDC dearer than USDT, below 0 cheaper on Oct-22 2026, the last day in this build, measured and published by askthetape.com.
A stablecoin is a promise that one token is worth one dollar. The promise is kept by people trading it, so you can watch the promise strain: every day has a lowest and a highest hourly close (a quote every 10 minutes since July 2026), and the moves inside an hour can go further. We have the Binance quote every hour back to December 2018 — with one stretch missing, 2022-09-27 to 2023-03-10 — which covers the March 2023 bank weekend, when the low of 2023-03-11 printed 0.9128 on our tape, about 91 cents — and since July 2026 we poll four markets every 10 minutes. It is the plainest stress gauge in crypto, and almost nobody plots the low of the day.
| leg | `usdc_peg_quotes` — Binance's own hourly bars (binance_usdcusdt), copied by us back to 2018-12-15 in one pull on 2026-07-19, then our own 10-minute poll of it since 2026-07-19; kraken_usdcusd, kraken_usdcusdt, kraken_usdtusd live since 2026-07-19 |
|---|---|
| cadence | hourly bars, then our own poll every 10 minutes; daily low / close / high |
| since | 2018-12-15 |
| policy | 🩸 the quote is USDC priced in USDT (Binance USDC/USDT), so the sign names the coin that slipped: below 0 = USDC below a dollar (the bank weekend, 2023-03-11), above 0 = USDT below a dollar (the Terra collapse, 2022-05-12, +500 bp; the Tether reserve scare, 2019-04-26, +384 bp). The stored deviation is UNSIGNED (|mid − 1| × 10 000), so above-peg and below-peg are separated here using the mid price itself, never the stored deviation alone: the «worst moment» line takes whichever of the day's low and high sits further from a dollar and keeps its sign. Checked on the bank weekend: 2023-03-11 low 0.9128, high 0.9764 — the stored minimum deviation of that day (236 bp) is the CLOSEST the day came to a dollar, not the furthest. · export: from 2026-07-19 (rows before that day are the exchange's own archive and stay here) |
| note | each source is its own line with its own start date: the deep history is one market, the live view is four, and the page says which is which |
| 🩸 edge | the deepest number on this page is the FIRST DAY BACK after that missing stretch (2022-09-27 … 2023-03-10): the low of the bank weekend is real and captured, but there is no captured hour of the days immediately before it, so nothing here says how the peg behaved on the way down |
| gaps | measured on this leg, not assumed: the line has no point on 2022-09-27 … 2023-03-10 (165 days) — it BREAKS there and nothing is drawn across it |
| hourly window | prod usdc_peg_quotes, Binance's hourly bars, then our own 10-minute poll, bucketed to the hour · since 2025-09-18 22:00Z by data, 9,600 hours with data inside a 9,600-hour span → 2026-10-23 21:00Z (the newest 400 days of an hourly record that starts 2018-12-15; the Tape and Desk windows draw these 400 days) · captured 2026-10-23T21:21:56Z |
| this build | data to Oct-22 2026 |
| policy | no backfill · read it here · export: from 2026-07-19 (rows before that day are the exchange's own archive and stay here) |
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-23 2026 21:24Z.
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