Boeing: a 3.2σ rise on 28 July 2026
Recorded 30 October 2026On 28 July 2026 Boeing rose 4.76% close to close, 3.2 times its typical daily move of 1.49% over the 20 sessions before it: larger than every one of the 0 sessions on record before it. 6 other instruments of the 199 measured that day moved 2σ or more.
The day
Daily closes, as recorded the night after
- Move
- +4.76%
- Size
- +3.2σ
- Typical day before it
- 1.49%
- Close
- 221.56
- Previous close, 27 July 2026
- 211.5
- Since, to 6 November 2026
- −21.74%
Boeing, the 16 sessions to 28 July 2026
Daily closes; the last point is the quake
Show values
| Point | BA |
|---|---|
| 6 Jul 2026 | 235 |
| 7 Jul 2026 | 232 |
| 8 Jul 2026 | 225 |
| 9 Jul 2026 | 223 |
| 10 Jul 2026 | 222 |
| 13 Jul 2026 | 216 |
| 14 Jul 2026 | 217 |
| 15 Jul 2026 | 218 |
| 16 Jul 2026 | 214 |
| 17 Jul 2026 | 214 |
| 20 Jul 2026 | 209 |
| 21 Jul 2026 | 205 |
| 22 Jul 2026 | 209 |
| 23 Jul 2026 | 209 |
| 24 Jul 2026 | 210 |
| 27 Jul 2026 | 212 |
| 28 Jul 2026 | 222 |
The same day
Other quakes on 28 July 2026
| Instrument | Move | Size |
|---|---|---|
| Berkshire Hathaway BRK.B | +3.06% | +3.9σ |
Boeing's other quakes
On record, newest first
- 27 October 2026: −10.69%, −7.6σ
- 28 September 2026: −6.91%, −4.4σ
- 3 August 2026: +8.03%, +3.5σ
How it is measured
The move is the close-to-close return; its size is that return divided by the standard deviation of Boeing'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 Boeing'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.