UnitedHealth: a 4.4σ rise on 14 October 2026
Recorded 16 October 2026On 14 October 2026 UnitedHealth rose 4.73% close to close, 4.4 times its typical daily move of 1.07% over the 20 sessions before it: larger than every one of the 64 sessions on record before it. 29 other instruments of the 199 measured that day moved 2σ or more.
The day
Daily closes, as recorded the night after
- Move
- +4.73%
- Size
- +4.4σ
- Typical day before it
- 1.07%
- Close
- 395.62
- Previous close, 13 October 2026
- 377.76
- Since, to 21 October 2026
- +5.40%
UnitedHealth, the 30 sessions to 14 October 2026
Daily closes; the last point is the quake
Show values
| Point | UNH |
|---|---|
| 1 Sep 2026 | 396 |
| 2 Sep 2026 | 400 |
| 3 Sep 2026 | 401 |
| 4 Sep 2026 | 397 |
| 8 Sep 2026 | 401 |
| 9 Sep 2026 | 393 |
| 10 Sep 2026 | 388 |
| 11 Sep 2026 | 379 |
| 14 Sep 2026 | 384 |
| 15 Sep 2026 | 376 |
| 16 Sep 2026 | 375 |
| 17 Sep 2026 | 375 |
| 18 Sep 2026 | 377 |
| 21 Sep 2026 | 378 |
| 22 Sep 2026 | 373 |
| 23 Sep 2026 | 371 |
| 24 Sep 2026 | 375 |
| 25 Sep 2026 | 377 |
| 28 Sep 2026 | 378 |
| 29 Sep 2026 | 375 |
| 30 Sep 2026 | 367 |
| 1 Oct 2026 | 365 |
| 2 Oct 2026 | 372 |
| 5 Oct 2026 | 379 |
| 6 Oct 2026 | 376 |
| 7 Oct 2026 | 376 |
| 8 Oct 2026 | 371 |
| 9 Oct 2026 | 379 |
| 12 Oct 2026 | 379 |
| 13 Oct 2026 | 378 |
| 14 Oct 2026 | 396 |
The same day
Other quakes on 14 October 2026
| Instrument | Move | Size |
|---|---|---|
| Bank of America BAC | −4.76% | −4.0σ |
| Lockheed Martin LMT | +3.61% | +3.5σ |
| AbbVie ABBV | +3.32% | +3.3σ |
| Pfizer PFE | +2.96% | +3.3σ |
| Silver SILVER | −6.10% | −3.3σ |
| TRON TRX | +1.56% | +3.3σ |
| Costco COST | +2.87% | +3.1σ |
| Marvell Technology MRVL | −8.73% | −3.1σ |
How it is measured
The move is the close-to-close return; its size is that return divided by the standard deviation of UnitedHealth'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 UnitedHealth'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.