FTSE 100: a 3.6σ fall on 9 September 2026
Recorded 7 October 2026On 9 September 2026 FTSE 100 fell 1.31% close to close, 3.6 times its typical daily move of 0.36% over the 20 sessions before it: larger than every one of the 48 sessions on record before it. 9 other instruments of the 199 measured that day moved 2σ or more.
The day
Daily closes, as recorded the night after
- Move
- −1.31%
- Size
- −3.6σ
- Typical day before it
- 0.36%
- Close
- 10,670.1
- Previous close, 8 September 2026
- 10,811.7
- Since, to 21 October 2026
- +0.78%
FTSE 100, the 30 sessions to 9 September 2026
Daily closes; the last point is the quake
Show values
| Point | FTSE |
|---|---|
| 28 Jul 2026 | 10,871 |
| 29 Jul 2026 | 10,908 |
| 30 Jul 2026 | 10,897 |
| 31 Jul 2026 | 10,868 |
| 3 Aug 2026 | 10,858 |
| 4 Aug 2026 | 10,879 |
| 5 Aug 2026 | 10,888 |
| 6 Aug 2026 | 10,868 |
| 7 Aug 2026 | 10,901 |
| 10 Aug 2026 | 10,863 |
| 11 Aug 2026 | 10,844 |
| 12 Aug 2026 | 10,833 |
| 13 Aug 2026 | 10,773 |
| 14 Aug 2026 | 10,750 |
| 17 Aug 2026 | 10,720 |
| 18 Aug 2026 | 10,728 |
| 19 Aug 2026 | 10,743 |
| 20 Aug 2026 | 10,748 |
| 21 Aug 2026 | 10,817 |
| 24 Aug 2026 | 10,854 |
| 25 Aug 2026 | 10,886 |
| 26 Aug 2026 | 10,878 |
| 27 Aug 2026 | 10,793 |
| 28 Aug 2026 | 10,824 |
| 1 Sep 2026 | 10,789 |
| 2 Sep 2026 | 10,757 |
| 3 Sep 2026 | 10,832 |
| 4 Sep 2026 | 10,831 |
| 7 Sep 2026 | 10,822 |
| 8 Sep 2026 | 10,812 |
| 9 Sep 2026 | 10,670 |
The same day
Other quakes on 9 September 2026
| Instrument | Move | Size |
|---|---|---|
| CAC 40 CAC | −1.94% | −3.5σ |
| Meta Platforms META | +6.55% | +3.2σ |
| Euro Stoxx 50 STOXX50 | −1.58% | −3.1σ |
| DAX 40 DAX | −1.66% | −3.0σ |
| Swiss Market Index SMI | −1.80% | −3.0σ |
How it is measured
The move is the close-to-close return; its size is that return divided by the standard deviation of FTSE 100'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 FTSE 100'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.