MKSI'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.
Learn more: Understanding unusual moves · Volume and confirmation
Close-to-close daily changes from 30 Mar 2021 to 12 Nov 2026 (1414 sessions). Later changes are measured from the close on the day of the move.
Biggest one-day falls
Of these 9, 6 were higher 21 sessions later · n = 9 · could be chance.
| Date | One-day change | After 5 sessions | After 21 sessions | After 63 sessions |
|---|---|---|---|---|
| 3 Apr 2025 | -20.9% | -0.0% | +15.9% | +59.0% |
| 3 Nov 2022 | -13.5% | +11.3% | +24.1% | +51.7% |
| 10 Apr 2025 | -12.2% | -0.8% | +41.3% | +63.0% |
| 2 Jul 2026 | -11.1% | +0.8% | -15.2% | -25.8% |
| 14 Sep 2026 | -10.5% | +7.3% | +3.5% | pending |
| 3 Sep 2024 | -9.9% | -1.5% | -1.5% | +9.8% |
| 29 Jul 2026 | -9.7% | +21.5% | +5.2% | -17.6% |
| 10 Oct 2025 | -9.7% | +12.6% | +31.0% | +53.3% |
| 28 Jul 2026 | -9.6% | +12.4% | -4.8% | -29.1% |
| 5 Nov 2026 | -9.3% | +25.3% | pending | pending |
Biggest one-day rises
Of these 9, 7 were higher 21 sessions later · n = 9 · could be chance.
| Date | One-day change | After 5 sessions | After 21 sessions | After 63 sessions |
|---|---|---|---|---|
| 9 Apr 2025 | +24.5% | -13.0% | +9.4% | +45.4% |
| 10 Nov 2022 | +18.3% | -2.5% | +9.4% | +29.2% |
| 30 Jul 2026 | +13.9% | -0.7% | -12.8% | -25.6% |
| 12 May 2025 | +13.4% | -2.5% | +3.2% | +14.0% |
| 7 Nov 2024 | +12.0% | -2.4% | -1.1% | -4.3% |
| 14 Dec 2023 | +11.0% | -0.1% | +2.0% | +21.3% |
| 6 Nov 2025 | +11.0% | -7.2% | +5.9% | +61.4% |
| 7 Aug 2025 | +10.2% | +6.0% | +10.4% | +41.7% |
| 9 Nov 2026 | +10.0% | pending | pending | pending |
| 13 Oct 2025 | +9.7% | +6.4% | +14.7% | +45.3% |