US Dollar / Hong Kong Dollar: a 3.0σ fall on 17 August 2026
Recorded 7 October 2026On 17 August 2026 US Dollar / Hong Kong Dollar fell 0.03% close to close, 3.0 times its typical daily move of 0.01% over the 20 sessions before it: larger than every one of the 32 sessions on record before it. 8 other instruments of the 199 measured that day moved 2σ or more.
The day
Daily closes, as recorded the night after
- Move
- −0.03%
- Size
- −3.0σ
- Typical day before it
- 0.01%
- Close
- 7.844
- Previous close, 16 August 2026
- 7.8466
- Since, to 23 October 2026
- −0.09%
US Dollar / Hong Kong Dollar, the 30 sessions to 17 August 2026
Daily closes; the last point is the quake
Show values
| Point | USD/HKD |
|---|---|
| 6 Jul 2026 | 7.8423 |
| 7 Jul 2026 | 7.8416 |
| 8 Jul 2026 | 7.8388 |
| 9 Jul 2026 | 7.8358 |
| 12 Jul 2026 | 7.8395 |
| 13 Jul 2026 | 7.8375 |
| 14 Jul 2026 | 7.8375 |
| 15 Jul 2026 | 7.8383 |
| 16 Jul 2026 | 7.8405 |
| 19 Jul 2026 | 7.8397 |
| 20 Jul 2026 | 7.8407 |
| 21 Jul 2026 | 7.8414 |
| 22 Jul 2026 | 7.8399 |
| 23 Jul 2026 | 7.8411 |
| 26 Jul 2026 | 7.8418 |
| 27 Jul 2026 | 7.8417 |
| 28 Jul 2026 | 7.8407 |
| 29 Jul 2026 | 7.8420 |
| 30 Jul 2026 | 7.8428 |
| 2 Aug 2026 | 7.8418 |
| 3 Aug 2026 | 7.8417 |
| 4 Aug 2026 | 7.8422 |
| 5 Aug 2026 | 7.8433 |
| 6 Aug 2026 | 7.8443 |
| 9 Aug 2026 | 7.8452 |
| 10 Aug 2026 | 7.8451 |
| 11 Aug 2026 | 7.8464 |
| 12 Aug 2026 | 7.8463 |
| 13 Aug 2026 | 7.8472 |
| 16 Aug 2026 | 7.8466 |
| 17 Aug 2026 | 7.8440 |
The same day
Other quakes on 17 August 2026
| Instrument | Move | Size |
|---|---|---|
| Lean Hogs HOGS | −14.33% | −16.2σ |
US Dollar / Hong Kong Dollar's other quakes
On record, newest first
- 21 October 2026: −0.03%, −3.3σ
- 19 August 2026: −0.05%, −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 US Dollar / Hong Kong Dollar'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 US Dollar / Hong Kong Dollar'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.