CHAPARRAL ENERGY INC (CHAP)
CHAP moved a median of 0.00% 30 minutes after news, and -1.30% by the close. How CHAP actually reacts to news — the realized, point-in-time move the market made, measured across 223 labeled events over its full measured history with zero look-ahead.
CHAP’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 32% | 216 |
| 30-min | 0.00% | 41% | 217 |
| 60-min | -0.52% | 38% | 217 |
| to close | -1.30% | 36% | 217 |
| Middle 50% of CHAP reactions | -2.78% to +1.70% |
|---|---|
| Median reaction (30-min) | 0.00% |
| Measured reactions | 223 |
Half of all CHAPARRAL ENERGY INC news events land between -2.78% and +1.70% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
Email me when CHAP moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to CHAP's baseline. Nothing else.
Where else CHAP is measured.
CHAP earnings → · Analyst actions → · SEC filings →
Other Energy names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| C&J ENERGY SERVICES INC (CJ) | 225 | +0.17% | 55% |
| ENBRIDGE ENERGY PARTNERS (EEP) | 224 | -0.10% | 44% |
| Comstock Resources, Inc. (CRK) | 223 | -0.24% | 40% |
| Nabors Industries Ltd. (NBR) | 222 | +0.12% | 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.
All Energy names, measured the same way →
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Every name we’ve measured, in one place.
How the numbers are made.
How is CHAPARRAL ENERGY INC's median reaction calculated?
Every labeled CHAP news event is measured from its own timestamp: the last trade before the news is the base price, and the move is read at fixed horizons — 30 minutes of trading, then the close. The median across 223 events is what this page reports. Point-in-time, zero look-ahead: no event borrows information from a later one.
What counts as a positive reaction?
Any event whose price move is above zero at the horizon, relative to the last trade before the news timestamp. 41% of CHAP's measured events are up at 30 minutes; the rest close the window flat or negative.
How often is this page updated?
The news table refreshes automatically as new events are labeled and priced. The reaction medians are re-pulled in batches from the dataset — the figures here are as of 2026-09-21.
Does CHAP's past reaction predict its next one?
No. These are realized facts about past events, not forecasts. They describe a distribution — they say nothing certain about any future move.