GD'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, 9 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 | -7.3% | +11.3% | +8.8% | +19.9% |
| 14 Nov 2024 | -6.9% | -4.3% | -9.0% | -16.1% |
| 8 Mar 2022 | -4.8% | +1.0% | +2.3% | +0.6% |
| 9 May 2022 | -4.3% | -0.7% | +0.9% | -0.2% |
| 29 Jan 2025 | -4.2% | +2.8% | +0.5% | +8.8% |
| 16 Mar 2022 | -4.2% | +5.3% | +7.6% | -3.8% |
| 7 Jan 2026 | -4.2% | +5.9% | +4.2% | -0.5% |
| 5 Jul 2022 | -4.2% | +1.0% | +7.5% | +2.8% |
| 11 Nov 2022 | -4.1% | +2.1% | +2.3% | -4.0% |
| 24 Apr 2024 | -4.0% | +1.9% | +5.5% | +4.0% |
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 Oct 2023 | +8.4% | +1.8% | +1.8% | +5.4% |
| 29 Apr 2026 | +8.0% | +2.5% | +2.4% | +12.8% |
| 9 Apr 2025 | +6.7% | +2.4% | +0.6% | +12.5% |
| 23 Jul 2025 | +6.5% | -1.5% | -0.1% | +7.5% |
| 11 Jun 2026 | +5.2% | -2.5% | +3.0% | -0.8% |
| 5 Mar 2025 | +4.8% | -1.1% | +2.5% | +5.2% |
| 24 Jan 2024 | +4.7% | +1.5% | +4.8% | +8.2% |
| 29 Oct 2026 | +4.6% | pending | pending | pending |
| 25 Feb 2022 | +4.3% | +7.6% | +5.7% | -2.4% |
| 4 May 2022 | +4.1% | -6.6% | -5.3% | -5.1% |