MCO'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 1 Apr 2021 to 4 Nov 2026 (1406 sessions). Later changes are measured from the close on the day of the move.
Biggest one-day falls
Of these 10, 5 were higher 21 sessions later · n = 10 · could be chance.
| Date | One-day change | After 5 sessions | After 21 sessions | After 63 sessions |
|---|---|---|---|---|
| 4 Apr 2025 | -9.0% | +6.5% | +15.0% | +24.2% |
| 3 Feb 2026 | -8.9% | -11.1% | -0.2% | -3.5% |
| 13 Feb 2024 | -7.9% | +1.8% | +4.1% | +9.1% |
| 10 Feb 2026 | -6.8% | +7.6% | +1.8% | +7.8% |
| 1 Jun 2022 | -6.4% | +0.5% | -2.6% | +1.0% |
| 3 Apr 2025 | -6.1% | -4.4% | +5.0% | +13.8% |
| 18 Sep 2025 | -5.8% | -2.0% | -2.3% | +3.5% |
| 25 Jan 2022 | -5.5% | +5.8% | -0.7% | -1.6% |
| 14 Nov 2022 | -5.4% | -0.6% | +1.6% | +6.0% |
| 11 Feb 2022 | -5.1% | -2.6% | -7.5% | -12.8% |
Biggest one-day rises
Of these 8, 3 were higher 21 sessions later · n = 8 · could be chance.
| Date | One-day change | After 5 sessions | After 21 sessions | After 63 sessions |
|---|---|---|---|---|
| 10 Nov 2022 | +12.1% | -1.5% | -0.9% | +6.8% |
| 9 Apr 2025 | +10.6% | -2.9% | +7.3% | +14.1% |
| 18 Feb 2026 | +6.5% | +2.8% | -3.3% | -3.6% |
| 5 Jan 2026 | +5.6% | +1.6% | -12.5% | -16.9% |
| 11 Nov 2022 | +5.5% | -5.8% | -2.6% | -0.2% |
| 25 Oct 2022 | +5.2% | +2.6% | +15.9% | +23.8% |
| 4 Nov 2026 | +4.9% | pending | pending | pending |
| 2 Jul 2026 | +4.7% | -0.7% | -1.5% | -8.9% |
| 6 Jan 2023 | +4.7% | +8.6% | +9.7% | +2.3% |
| 15 Oct 2026 | +4.5% | +1.5% | pending | pending |