After an event
Pick an event to see what the market did in the weeks and months after each past time it happened. How it works →
Or ask about an index move, e.g. “Nasdaq falls 10% in 2 days” or “Hang Seng up 5% in a week”.
WHO global health emergency: what came after
The market here is the S&P 500, measured by the SPY fund with dividends added back · 6 times in our prices (2016-01-04 to 2026-10-30) · measured from that day's close
| 2 weeks | 4 weeks | 3 months | |
|---|---|---|---|
| Middle result | +2.8% | +1.0% | +2.5% |
| How often it was up | 67% | 67% | 67% |
| Worst | -9.5% | -9.6% | -10.8% |
| Best | +4.4% | +4.5% | +17.0% |
| Any window | +0.9% · 66% | +1.8% · 70% | +4.6% · 79% |
“Any window”: the middle result, and how often the market was up, over every window of the same length since 2016-01-04, event or not.
Each one (6), newest first
| Date | 2 weeks | 4 weeks | 3 months |
|---|---|---|---|
| 2026-05-17 | +2.8% | +1.6% | +4.2% |
| 2024-08-14 | +2.7% | +2.8% | +10.1% |
| 2022-07-23 | +4.4% | +4.5% | -5.0% |
| 2020-03-11 | -9.5% | +0.5% | +17.0% |
| 2020-01-30 | +2.9% | -9.6% | -10.8% |
| 2019-07-17 | -0.1% | -4.6% | +0.8% |
- What happened after past ones, not what will happen after the next one.
- Dates: WHO declarations (PHEIC or pandemic), as listed by Wikipedia, checked 2026-11-08. Source