SYK'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 9, 4 were higher 21 sessions later · n = 9 · could be chance.
| Date | One-day change | After 5 sessions | After 21 sessions | After 63 sessions |
|---|---|---|---|---|
| 8 Sep 2026 | -8.8% | +1.8% | -0.4% | pending |
| 22 Apr 2022 | -8.0% | -2.8% | -6.1% | -18.6% |
| 1 May 2026 | -6.5% | -3.1% | -0.5% | +15.8% |
| 31 Jul 2026 | -6.4% | +4.1% | -0.6% | -4.3% |
| 30 Oct 2026 | -6.4% | pending | pending | pending |
| 14 Jul 2026 | -6.1% | +1.1% | +11.6% | -9.2% |
| 4 Apr 2025 | -6.1% | +1.3% | +9.2% | +12.9% |
| 11 Oct 2023 | -5.2% | +3.9% | +4.1% | +19.1% |
| 7 Mar 2022 | -5.1% | -3.0% | +6.2% | -9.7% |
| 26 Sep 2023 | -4.8% | -2.5% | -5.0% | +9.6% |
Biggest one-day rises
Of these 8, 4 were higher 21 sessions later · n = 8 · could be chance.
| Date | One-day change | After 5 sessions | After 21 sessions | After 63 sessions |
|---|---|---|---|---|
| 1 Feb 2023 | +9.9% | -3.8% | -2.7% | +3.2% |
| 4 Nov 2026 | +9.4% | pending | pending | pending |
| 9 Apr 2025 | +7.6% | -4.5% | +4.9% | +7.5% |
| 31 Jan 2024 | +5.9% | +2.2% | +5.3% | -2.0% |
| 10 Nov 2022 | +5.7% | +0.0% | +13.8% | +22.3% |
| 26 Jun 2026 | +5.3% | -2.4% | +4.2% | -18.1% |
| 2 Nov 2026 | +5.1% | pending | pending | pending |
| 6 Jan 2026 | +5.0% | -2.9% | -1.1% | -7.2% |
| 19 Apr 2022 | +4.9% | -8.4% | -14.5% | -26.8% |
| 3 Aug 2026 | +4.8% | +1.4% | -7.0% | -14.5% |