Bitcoin: a 3.5σ rise on 21 August 2026
Recorded 7 October 2026On 21 August 2026 Bitcoin rose 7.26% close to close, 3.5 times its typical daily move of 2.07% over the 20 sessions before it: its largest move since 19 August 2026. 31 other instruments of the 147 measured that day moved 2σ or more.
The day
Daily closes, as recorded the night after
- Move
- +7.26%
- Size
- +3.5σ
- Typical day before it
- 2.07%
- Close
- 78,335.19
- Previous close, 20 August 2026
- 73,032.76
- Since, to 23 October 2026
- +3.59%
Bitcoin, the 30 sessions to 21 August 2026
Daily closes; the last point is the quake
Show values
| Point | BTC |
|---|---|
| 22 Jul 2026 | 66,101 |
| 23 Jul 2026 | 65,045 |
| 24 Jul 2026 | 64,098 |
| 25 Jul 2026 | 64,312 |
| 26 Jul 2026 | 65,340 |
| 27 Jul 2026 | 63,725 |
| 28 Jul 2026 | 63,871 |
| 29 Jul 2026 | 63,908 |
| 30 Jul 2026 | 64,725 |
| 31 Jul 2026 | 62,814 |
| 1 Aug 2026 | 62,763 |
| 2 Aug 2026 | 63,482 |
| 3 Aug 2026 | 63,461 |
| 4 Aug 2026 | 64,056 |
| 5 Aug 2026 | 64,598 |
| 6 Aug 2026 | 64,262 |
| 7 Aug 2026 | 64,880 |
| 8 Aug 2026 | 64,905 |
| 9 Aug 2026 | 64,845 |
| 10 Aug 2026 | 63,911 |
| 11 Aug 2026 | 63,552 |
| 12 Aug 2026 | 63,402 |
| 13 Aug 2026 | 63,402 |
| 14 Aug 2026 | 62,976 |
| 15 Aug 2026 | 63,024 |
| 16 Aug 2026 | 62,819 |
| 17 Aug 2026 | 64,506 |
| 18 Aug 2026 | 64,681 |
| 19 Aug 2026 | 69,266 |
| 20 Aug 2026 | 73,033 |
| 21 Aug 2026 | 78,335 |
The same day
Other quakes on 21 August 2026
| Instrument | Move | Size |
|---|---|---|
| Bitcoin Cash BCH | +28.90% | +16.0σ |
| Aave AAVE | +23.45% | +8.6σ |
| Ethereum Classic ETC | +19.55% | +7.8σ |
| Litecoin LTC | +11.08% | +6.9σ |
| Dogecoin DOGE | +13.93% | +5.5σ |
| Immutable IMX | +12.93% | +5.2σ |
| Aptos APT | +12.66% | +4.8σ |
| Hedera HBAR | +8.59% | +4.7σ |
| Cardano ADA | +15.15% | +4.4σ |
| Robinhood HOOD | +13.70% | +4.2σ |
| NEAR Protocol NEAR | +11.24% | +4.2σ |
| Chainlink LINK | +12.26% | +4.0σ |
| Polkadot DOT | +10.52% | +3.8σ |
| Stellar XLM | +11.24% | +3.7σ |
| TRON TRX | +1.76% | +3.6σ |
| VeChain VET | +10.83% | +3.6σ |
| XRP XRP | +14.61% | +3.5σ |
| Aluminium ALUM | +4.76% | +3.4σ |
| Algorand ALGO | +10.69% | +3.1σ |
| Rough Rice RICE | +3.93% | +3.1σ |
| BNB BNB | +4.90% | +3.0σ |
Bitcoin's other quakes
On record, newest first
- 21 September 2026: +6.73%, +3.1σ
- 18 September 2026: +5.89%, +3.4σ
- 19 August 2026: +7.09%, +6.2σ
How it is measured
The move is the close-to-close return; its size is that return divided by the standard deviation of Bitcoin's previous 20 daily returns. A quake is 3σ or more. This record was made the night after the day finished trading and has not been changed since. The live chart is on Bitcoin's page; the last few months of every market's daily moves are on the volatility terrain, and every quake on record is in the quake archive.