Koppers Holdings Inc. Koppers Holdings Inc. (KOP) by event type
KOP moves most on analyst upgrades — a median of +0.39% at 30 minutes across 12 measured events. Each row is measured over the last three years and read against the price at its own news timestamp. Back to the KOP overview →
How KOP reacts across 2 measured event types.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades 477 of 2,717 | 12 | +0.39% | 67% | +0.97% |
| Rating reiterations 2,742 of 3,522 | 37 | -0.14% | 41% | +0.57% |
Last 3 years, pulled 2026-09-21. 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. 2 further classes were observed with fewer than 10 measured events and are not published.
That’s how KOP usually reacts — get an email when it moves on news →Every name measured for these event types: Analyst upgrades → · Rating reiterations → · KOP overview →
Other Basic Materials names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Minerals Technologies Inc. (MTX) | 434 | -0.03% | 45% |
| Gevo, Inc. (GEVO) | 433 | +0.08% | 51% |
| Beacon Roofing Supply, Inc. (BECN) | 431 | +0.03% | 52% |
| HI-CRUSH PARTNERS (HCLP) | 431 | -0.06% | 43% |
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.