Costco (COST) by event type
COST moves most on analyst downgrades — a median of -0.45% at 30 minutes across 28 measured events. Each row is measured over the last three years and read against the price at its own news timestamp. Back to the COST overview →
How COST reacts across 6 measured event types.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades 426 of 2,717 | 21 | +0.43% | 81% | +0.81% |
| Analyst downgrades 2,176 of 2,603 | 28 | -0.45% | 33% | -0.54% |
| Coverage initiations 940 of 2,283 | 25 | +0.08% | 64% | +0.28% |
| Rating reiterations 2,172 of 3,522 | 342 | -0.04% | 47% | +0.04% |
| Price-target raises 1,269 of 1,790 | 150 | -0.08% | 43% | +0.05% |
| Price-target cuts 1,419 of 1,527 | 22 | -0.39% | 18% | +0.05% |
Last 3 years, pulled 2026-07-14. Reaction = percent move vs. the price at the news timestamp. Counts and medians only. The rank under each event type orders every name measured for it by median 30-min reaction, most positive first — so a low rank on a downgrade means this name falls harder than most, not that it moves less. Names with an identical median share a rank; a name the cross-section does not carry shows no rank rather than a guessed one.
That’s how COST usually reacts — get an email when it moves on news →Every name measured for these event types: Analyst upgrades → · Analyst downgrades → · Coverage initiations → · Rating reiterations → · Price-target raises → · Price-target cuts → · COST overview →
Other Consumer Staples names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Coca-Cola (KO) | 2,000+ | -0.02% | 47% |
| Walmart (WMT) | 2,000+ | +0.01% | 52% |
Same sector, same measurement: percent move vs. the price at the news timestamp, read at 30 minutes. Sample sizes differ, so the medians are comparable but the confidence behind them is not.