EFX's biggest one-day moves since 2021, and what happened next
Describes the past; not a signal. Pre-licensed data — internal estimates, to be re-verified after our licensed data rebuild.
Close-to-close daily changes from 5 Apr 2021 to 4 Nov 2026 (1405 sessions). Later changes are measured from the close on the day of the move.
Biggest one-day falls
Of these 10, 6 were higher 21 sessions later · n = 10 · could be chance.
| Date | One-day change | After 5 sessions | After 21 sessions | After 63 sessions |
|---|---|---|---|---|
| 3 Feb 2026 | -12.1% | +15.8% | +18.2% | -2.9% |
| 4 Apr 2025 | -9.4% | +4.8% | +24.8% | +26.0% |
| 20 Jul 2023 | -8.9% | -6.2% | -11.2% | -18.9% |
| 18 Apr 2024 | -8.5% | +4.0% | +14.4% | +19.9% |
| 2 Oct 2025 | -8.5% | +0.4% | -9.1% | -7.9% |
| 6 Feb 2025 | -8.4% | +1.4% | +1.1% | +9.7% |
| 21 Apr 2022 | -8.3% | +1.7% | -4.1% | -0.8% |
| 22 Jul 2025 | -8.2% | +3.7% | +4.2% | -3.1% |
| 17 Jun 2026 | -7.4% | -1.9% | +16.3% | +4.1% |
| 22 Apr 2026 | -7.2% | -3.4% | -8.7% | -6.7% |
Biggest one-day rises
Of these 7, 7 were higher 21 sessions later · n = 7 · could be chance.
| Date | One-day change | After 5 sessions | After 21 sessions | After 63 sessions |
|---|---|---|---|---|
| 22 Apr 2021 | +14.9% | +3.0% | +7.1% | +13.0% |
| 22 Apr 2025 | +13.8% | +5.5% | +5.5% | +0.5% |
| 10 Nov 2022 | +13.7% | +6.0% | +6.0% | +14.1% |
| 20 Oct 2026 | +11.3% | -0.5% | pending | pending |
| 9 Apr 2025 | +9.2% | -2.3% | +20.3% | +15.5% |
| 15 Oct 2026 | +7.2% | +16.0% | pending | pending |
| 14 Nov 2023 | +6.7% | +6.7% | +25.8% | +32.9% |
| 22 Oct 2026 | +6.6% | -4.1% | pending | pending |
| 2 Jul 2026 | +6.1% | -3.3% | +1.2% | -18.8% |
| 2 Nov 2023 | +6.1% | +3.6% | +26.8% | +37.9% |