Bitcoin: a 3.1σ rise on 21 September 2026
Recorded 7 October 2026On 21 September 2026 Bitcoin rose 6.73% close to close, 3.1 times its typical daily move of 2.17% over the 20 sessions before it: its largest move since 18 September 2026. 28 other instruments of the 198 measured that day moved 2σ or more.
The day
Daily closes, as recorded the night after
- Move
- +6.73%
- Size
- +3.1σ
- Typical day before it
- 2.17%
- Close
- 86,602.91
- Previous close, 20 September 2026
- 81,142.61
- Since, to 23 October 2026
- −6.30%
Bitcoin, the 30 sessions to 21 September 2026
Daily closes; the last point is the quake
Show values
| Point | BTC |
|---|---|
| 22 Aug 2026 | 77,083 |
| 23 Aug 2026 | 77,755 |
| 24 Aug 2026 | 78,964 |
| 25 Aug 2026 | 78,565 |
| 26 Aug 2026 | 79,027 |
| 27 Aug 2026 | 80,258 |
| 28 Aug 2026 | 77,830 |
| 29 Aug 2026 | 78,246 |
| 30 Aug 2026 | 77,668 |
| 31 Aug 2026 | 78,549 |
| 1 Sep 2026 | 77,404 |
| 2 Sep 2026 | 77,300 |
| 3 Sep 2026 | 81,272 |
| 4 Sep 2026 | 79,672 |
| 5 Sep 2026 | 79,824 |
| 6 Sep 2026 | 80,350 |
| 7 Sep 2026 | 79,116 |
| 8 Sep 2026 | 78,439 |
| 9 Sep 2026 | 78,260 |
| 10 Sep 2026 | 76,568 |
| 11 Sep 2026 | 77,174 |
| 12 Sep 2026 | 77,270 |
| 13 Sep 2026 | 76,838 |
| 14 Sep 2026 | 78,163 |
| 15 Sep 2026 | 75,613 |
| 16 Sep 2026 | 76,150 |
| 17 Sep 2026 | 76,404 |
| 18 Sep 2026 | 80,901 |
| 19 Sep 2026 | 81,234 |
| 20 Sep 2026 | 81,143 |
| 21 Sep 2026 | 86,603 |
The same day
Other quakes on 21 September 2026
| Instrument | Move | Size |
|---|---|---|
| Meta Platforms META | +11.34% | +5.9σ |
| Dogecoin DOGE | +14.14% | +4.2σ |
| Arm Holdings ARM | +17.16% | +4.1σ |
| Qualcomm QCOM | +9.29% | +3.9σ |
| Novo Nordisk NVO | −7.96% | −3.7σ |
| Intuitive Machines LUNR | +12.93% | +3.5σ |
| Nasdaq 100 NDX | +2.83% | +3.3σ |
| Intel INTC | +12.14% | +3.2σ |
| AMD AMD | +9.95% | +3.1σ |
| AppLovin APP | +7.18% | +3.0σ |
Bitcoin's other quakes
On record, newest first
- 18 September 2026: +5.89%, +3.4σ
- 21 August 2026: +7.26%, +3.5σ
- 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.