Amazon: a 3.0σ fall on 23 July 2026
Recorded 22 October 2026On 23 July 2026 Amazon fell 4.57% close to close, 3.0 times its typical daily move of 1.52% over the 20 sessions before it: larger than every one of the 3 sessions on record before it. 19 other instruments of the 199 measured that day moved 2σ or more.
The day
Daily closes, as recorded the night after
- Move
- −4.57%
- Size
- −3.0σ
- Typical day before it
- 1.52%
- Close
- 233.66
- Previous close, 22 July 2026
- 244.85
- Since, to 21 October 2026
- +12.29%
Amazon, the 19 sessions to 23 July 2026
Daily closes; the last point is the quake
Show values
| Point | AMZN |
|---|---|
| 25 Jun 2026 | 227 |
| 26 Jun 2026 | 233 |
| 29 Jun 2026 | 240 |
| 30 Jun 2026 | 238 |
| 1 Jul 2026 | 242 |
| 2 Jul 2026 | 243 |
| 6 Jul 2026 | 244 |
| 7 Jul 2026 | 246 |
| 8 Jul 2026 | 244 |
| 9 Jul 2026 | 247 |
| 10 Jul 2026 | 245 |
| 13 Jul 2026 | 247 |
| 14 Jul 2026 | 247 |
| 15 Jul 2026 | 255 |
| 16 Jul 2026 | 250 |
| 17 Jul 2026 | 247 |
| 20 Jul 2026 | 250 |
| 21 Jul 2026 | 248 |
| 22 Jul 2026 | 245 |
| 23 Jul 2026 | 234 |
The same day
Other quakes on 23 July 2026
| Instrument | Move | Size |
|---|---|---|
| Lockheed Martin LMT | +10.54% | +6.1σ |
| RTX RTX | +7.33% | +5.4σ |
| US Dollar / South African Rand USD/ZAR | +2.58% | +5.2σ |
| US Dollar / Turkish Lira USD/TRY | +0.22% | +4.3σ |
| Tesla TSLA | −14.52% | −4.0σ |
| FTSE MIB MIB | −2.80% | −3.5σ |
| Alphabet GOOGL | −7.13% | −3.4σ |
Amazon's other quakes
On record, newest first
- 19 October 2026: +4.98%, +3.2σ
- 31 July 2026: +15.32%, +8.4σ
How it is measured
The move is the close-to-close return; its size is that return divided by the standard deviation of Amazon'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 Amazon'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.