AJG'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 |
|---|---|---|---|---|
| 9 Feb 2026 | -9.8% | -1.7% | -3.7% | -8.8% |
| 14 Dec 2023 | -7.4% | -1.8% | +3.1% | +12.0% |
| 4 Apr 2025 | -7.3% | +4.6% | +6.0% | -1.5% |
| 29 Jul 2025 | -6.7% | -0.9% | +3.6% | -3.2% |
| 29 Apr 2022 | -6.0% | -2.4% | -3.9% | +2.7% |
| 16 Oct 2025 | -5.4% | +0.8% | -7.7% | -7.7% |
| 27 Jan 2026 | -5.1% | +2.2% | -7.1% | -11.9% |
| 31 Oct 2025 | -4.8% | +0.2% | -2.1% | -0.7% |
| 14 Oct 2022 | -4.6% | +2.9% | +9.0% | +15.1% |
| 30 Jul 2026 | -4.6% | -1.8% | +4.3% | +1.7% |
Biggest one-day rises
Of these 7, 3 were higher 21 sessions later · n = 7 · could be chance.
| Date | One-day change | After 5 sessions | After 21 sessions | After 63 sessions |
|---|---|---|---|---|
| 28 Oct 2022 | +6.2% | -0.1% | +3.8% | +4.1% |
| 15 Oct 2026 | +5.5% | +8.3% | pending | pending |
| 4 Nov 2026 | +5.5% | pending | pending | pending |
| 14 Sep 2026 | +5.4% | -6.4% | -7.9% | pending |
| 2 Jul 2026 | +5.3% | +0.3% | -1.8% | -8.0% |
| 22 Oct 2026 | +4.9% | -1.0% | pending | pending |
| 28 Jul 2026 | +4.7% | -6.5% | -0.1% | +0.8% |
| 1 Jul 2026 | +4.4% | +5.9% | +4.1% | -4.6% |
| 30 Mar 2026 | +4.3% | +0.8% | -1.9% | +6.3% |
| 2 May 2025 | +4.2% | +2.1% | +4.3% | -13.9% |