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COST
Costco Wholesale Corporation
$1028.24$-22.21 (-2.11%) ↓
Historical Post-Earnings Moves
(click on the individual quarter bar to view post earning metrics on the right side)
% Price Move
Intraday Moves after ER - Mar 5, 2026
| Prev Day Close | $981.15 |
| Open Price | $965.61 |
| Intraday High | $1001.05 |
| Intraday Low | $959.07 |
| Close Price | $996.65 |
| Open → Close % | +3.21% |
| Opening Gap % | -1.58% |
Historical Averages (2Y)
| Avg Positive Post ER Move | +1.16% |
| Avg Negative Post ER Move | -3.57% |
| Avg Absolute Move (move either way) | 2.06% |
| Avg 7D Run Up to ER | -0.64% |
| Avg 7D Move After ER | -1.31% |
Price Movements Before and After Earnings by Quarter
| Metric | Q2 2024 | Q3 2024 | Q4 2024 | Q1 2025 | Q2 2025 | Q3 2025 | Q4 2025 | Q1 2026 |
|---|---|---|---|---|---|---|---|---|
| 7d ER Runup | +2.97% | -0.31% | +0.18% | -0.71% | -1.85% | -1.47% | -2.49% | -1.44% |
| Pre ER Move | +0.41% | -0.43% | -1.33% | -0.61% | -0.72% | -0.96% | +0.98% | -1.40% |
| Opening Gap after ER | +0.13% | -0.91% | -0.75% | -3.07% | -0.64% | -1.88% | -0.13% | -1.58% |
| Post ER Move | +1.00% | -1.75% | +0.10% | -6.07% | +3.12% | -2.90% | +0.00% | +1.58% |
| 7d Move Post ER | +1.26% | -1.14% | -2.74% | -9.17% | +1.26% | -1.10% | -3.13% | +4.28% |
Pre ER Move: AMC — open to close on earnings day | BMO — previous day open to close
Post ER Move: AMC — earnings day close to next day close | BMO — previous day close to earnings day close