IDXX'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, 4 were higher 21 sessions later · n = 10 · could be chance.
| Date | One-day change | After 5 sessions | After 21 sessions | After 63 sessions |
|---|---|---|---|---|
| 31 Oct 2024 | -9.8% | +6.4% | +5.9% | +14.3% |
| 13 Sep 2022 | -6.9% | -3.5% | -6.4% | +20.7% |
| 31 Jul 2025 | -6.6% | +21.7% | +21.1% | +17.5% |
| 25 Jan 2022 | -6.5% | +7.4% | +6.6% | -4.7% |
| 5 May 2022 | -6.4% | -9.6% | -3.3% | +5.9% |
| 5 Aug 2025 | -6.0% | +1.6% | -0.2% | +12.6% |
| 11 Apr 2022 | -6.0% | -2.6% | -35.1% | -29.4% |
| 9 May 2022 | -5.9% | +4.4% | +7.8% | +12.6% |
| 2 Nov 2021 | -5.9% | +0.3% | -4.5% | -14.8% |
| 26 Aug 2022 | -5.7% | -1.7% | -5.8% | +17.6% |
Biggest one-day rises
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 |
|---|---|---|---|---|
| 4 Aug 2025 | +27.5% | -4.5% | -7.2% | -7.8% |
| 2 Nov 2026 | +21.8% | pending | pending | pending |
| 3 Nov 2025 | +14.8% | -1.8% | +0.4% | -11.1% |
| 3 Feb 2025 | +11.1% | -0.9% | -6.8% | +1.3% |
| 9 Apr 2025 | +10.0% | +1.3% | +23.8% | +34.3% |
| 1 Nov 2022 | +9.8% | -3.0% | +11.2% | +27.7% |
| 10 Nov 2022 | +9.5% | -1.4% | +1.7% | +19.4% |
| 1 May 2025 | +9.0% | +3.9% | +9.2% | +13.6% |
| 5 Feb 2024 | +8.5% | -1.1% | -2.6% | -16.6% |
| 24 Feb 2022 | +7.4% | +5.6% | +5.7% | -27.8% |