Arch Resources, Inc. Class A (ARCH) by event type
ARCH moves most on coverage initiations — a median of +0.28% at 30 minutes across 19 measured events. Each row is measured over the last three years and read against the price at its own news timestamp. Back to the ARCH overview →
How ARCH reacts across 3 measured event types.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst downgrades 1,007 of 2,603 | 11 | +0.10% | 55% | -0.09% |
| Coverage initiations 624 of 2,283 | 19 | +0.28% | 53% | +0.61% |
| Rating reiterations 687 of 3,522 | 22 | +0.13% | 55% | +0.37% |
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. 3 further classes were observed with fewer than 10 measured events and are not published.
That’s how ARCH usually reacts — get an email when it moves on news →Every name measured for these event types: Analyst downgrades → · Coverage initiations → · Rating reiterations → · ARCH overview →
Other Basic Materials names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| New Gold Inc. (NGD) | 232 | +0.10% | 50% |
| GOLDEN QUEEN MINING (GQMNF) | 230 | 0.00% | 36% |
| Iamgold Corporation Ordinary Shares (IAG) | 228 | +0.04% | 52% |
| Denison Mines Corp Ordinary Shares (Canada) (DNN) | 227 | +0.30% | 54% |
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.