US Dollar / Hong Kong Dollar: a 3.5σ fall on 19 August 2026
Recorded 7 October 2026On 19 August 2026 US Dollar / Hong Kong Dollar fell 0.05% close to close, 3.5 times its typical daily move of 0.01% over the 20 sessions before it: larger than every one of the 34 sessions on record before it. 56 other instruments of the 200 measured that day moved 2σ or more.
The day
Daily closes, as recorded the night after
- Move
- −0.05%
- Size
- −3.5σ
- Typical day before it
- 0.01%
- Close
- 7.84
- Previous close, 18 August 2026
- 7.8437
- Since, to 23 October 2026
- −0.04%
US Dollar / Hong Kong Dollar, the 30 sessions to 19 August 2026
Daily closes; the last point is the quake
Show values
| Point | USD/HKD |
|---|---|
| 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 |
| 18 Aug 2026 | 7.8437 |
| 19 Aug 2026 | 7.8400 |
The same day
Other quakes on 19 August 2026
| Instrument | Move | Size |
|---|---|---|
| Ethereum ETH | +17.48% | +14.0σ |
| Merck MRK | +12.60% | +11.8σ |
| Stellar XLM | +9.93% | +8.1σ |
| XRP XRP | +10.29% | +7.8σ |
| Solana SOL | +10.83% | +7.7σ |
| Ethereum Classic ETC | +7.53% | +6.4σ |
| Bitcoin BTC | +7.09% | +6.2σ |
| British Pound / Swiss Franc GBP/CHF | −1.32% | −5.7σ |
| Euro / Swiss Franc EUR/CHF | −0.96% | −4.9σ |
| Dogecoin DOGE | +6.78% | +4.8σ |
| Litecoin LTC | +5.45% | +4.8σ |
| NEAR Protocol NEAR | +8.83% | +4.7σ |
| VeChain VET | +9.24% | +4.7σ |
| Chainlink LINK | +10.57% | +4.4σ |
| US Dollar / Swiss Franc USD/CHF | −1.78% | −4.4σ |
| Hedera HBAR | +4.92% | +4.2σ |
| Aave AAVE | +8.89% | +4.1σ |
| Canadian Dollar / Swiss Franc CAD/CHF | −1.24% | −4.0σ |
| Australian Dollar / Swiss Franc AUD/CHF | −1.20% | −3.7σ |
| Optimism OP | +9.66% | +3.7σ |
| Avalanche AVAX | +6.89% | +3.5σ |
| Bitcoin Cash BCH | +4.88% | +3.5σ |
| Cotton COTTON | +3.42% | +3.4σ |
| US Dollar / Czech Koruna USD/CZK | −0.99% | −3.4σ |
| Injective INJ | +12.28% | +3.3σ |
| Strategy MSTR | +12.68% | +3.3σ |
| Euro / US Dollar EUR/USD | +0.81% | +3.1σ |
| GE Aerospace GE | −5.03% | −3.1σ |
| US Dollar / Danish Krone USD/DKK | −0.83% | −3.1σ |
| US Dollar Index DXY | −0.82% | −3.0σ |
US Dollar / Hong Kong Dollar's other quakes
On record, newest first
- 21 October 2026: −0.03%, −3.3σ
- 17 August 2026: −0.03%, −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 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.