Enerplus Corporation (ERF)
ERF moved a median of +0.37% 30 minutes after news, and +0.10% by the close. How ERF actually reacts to news — the realized, point-in-time move the market made, measured across 48 labeled events over the last three years with zero look-ahead.
ERF’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | +0.59% | 71% | 44 |
| 30-min | +0.37% | 61% | 44 |
| 60-min | +0.02% | 50% | 44 |
| to close | +0.10% | 64% | 44 |
| Middle 50% of ERF reactions | -0.17% to +2.93% |
|---|---|
| Median reaction (30-min) | +0.37% |
| Measured reactions | 48 |
Half of all Enerplus Corporation news events land between -0.17% and +2.93% 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 ERF moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to ERF's baseline. Nothing else.
Recent ERF events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Chord Energy and Enerplus Complete Combination, Creating Premier Williston-Focused E&P Company | Press release | Canada Newswire | — | — | |
| Form 6-K ENERPLUS Corp For: May 31 | SEC filing · Form 6-K | SEC EDGAR | — | — | |
| Form SD ENERPLUS Corp | SEC filing · Form SD | SEC EDGAR | — | — | |
| Enerplus Announces Shareholder Approval of Transaction with Chord Energy Corporation and Receipt of Investment Canada Act Approval | Press release | Canada Newswire | -0.12% | +0.32% | |
| Form 6-K ENERPLUS Corp For: May 24 | SEC filing · Form 6-K | SEC EDGAR | +0.07% | +0.35% | |
| Enerplus Announces Special Dividend and Anticipated Closing Date for Transaction with Chord Energy Corporation | Press release | Canada Newswire | +0.54% | -1.93% | |
| Form 6-K ENERPLUS Corp For: May 23 | SEC filing · Form 6-K | SEC EDGAR | +0.54% | -1.93% | |
| Form 6-K ENERPLUS Corp For: May 08 | SEC filing · Form 6-K | SEC EDGAR | +1.31% | +1.31% | |
| Enerplus Announces First Quarter 2024 Results | Press release | Canada Newswire | +1.31% | +1.31% | |
| Enerplus Announces its Quarterly Cash Dividend for June 2024 | Press release | Canada Newswire | +1.31% | +1.31% | |
| Form 6-K ENERPLUS Corp For: May 08 | SEC filing · Form 6-K | SEC EDGAR | +1.31% | +1.31% | |
| Enerplus to Report First Quarter 2024 Results May 8 | Press release | Canada Newswire | -0.24% | +0.10% | |
| Form 6-K ENERPLUS Corp For: Apr 26 | SEC filing · Form 6-K | SEC EDGAR | -0.24% | +0.10% | |
| Enerplus Announces Filing of Management Information Circular for Special Meeting of Shareholders | Press release | Canada Newswire | -0.24% | +0.10% | |
| Form 6-K ENERPLUS Corp For: Apr 25 | SEC filing · Form 6-K | SEC EDGAR | -0.24% | +0.10% | |
| Form 6-K ENERPLUS Corp For: Apr 08 | SEC filing · Form 6-K | SEC EDGAR | +0.00% | -0.39% | |
| Chord Energy and Enerplus Announce Expiration of Hart-Scott-Rodino Act Waiting Period and Provide Transaction Update | Press release | Canada Newswire | +0.64% | -0.10% | |
| Form 6-K ENERPLUS Corp For: Apr 08 | SEC filing · Form 6-K | SEC EDGAR | +0.64% | -0.10% | |
| Form 6-K ENERPLUS Corp For: Mar 14 | SEC filing · Form 6-K | SEC EDGAR | -0.03% | +0.11% | |
| Form 6-K ENERPLUS Corp For: Feb 29 | SEC filing · Form 6-K | SEC EDGAR | +0.11% | -0.56% | |
| Form 6-K ENERPLUS Corp For: Feb 21 | SEC filing · Form 6-K | SEC EDGAR | -0.74% | -0.74% | |
| Form 6-K ENERPLUS Corp For: Feb 21 | SEC filing · Form 6-K | SEC EDGAR | +2.79% | +0.79% | |
| Enerplus Announces 2023 Year End Reserves Results | Press release | Canada Newswire | +2.79% | +0.79% | |
| Enerplus Announces an 8% Increase to its Quarterly Cash Dividend for March 2024 | Press release | Canada Newswire | +2.79% | +0.79% | |
| Enerplus Announces Fourth Quarter and Full Year 2023 Financial and Operating Results | Press release | Canada Newswire | +2.79% | +0.79% | |
| Form 40-F ENERPLUS Corp For: Dec 31 | SEC filing · Form 40-F | SEC EDGAR | +2.79% | +0.79% | |
| Form 6-K ENERPLUS Corp For: Feb 02 | SEC filing · Form 6-K | SEC EDGAR | +0.00% | -0.51% | |
| Enerplus Provides Fourth Quarter & Operational Update; Full-Year Results & Reserves to be Released February 22 | Press release | Canada Newswire | +0.07% | +1.11% | |
| Form 6-K ENERPLUS Corp For: Jan 25 | SEC filing · Form 6-K | SEC EDGAR | +0.07% | +1.11% | |
| Enerplus Announces Quarterly Cash Dividend for December 2023 | Press release | Canada Newswire | +2.33% | -0.74% | |
| Enerplus Announces Third Quarter 2023 Results; Increases 2023 Production Guidance | Press release | Canada Newswire | +2.33% | -0.74% | |
| Form 6-K ENERPLUS Corp For: Nov 02 | SEC filing · Form 6-K | SEC EDGAR | +2.33% | -0.74% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the ERF section they belong to.
Where else ERF is measured.
ERF earnings → · Analyst actions → · SEC filings →
Other Energy names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Energy Exploration Tech Inc (SFD_TSE) | 51 | 0.00% | 19% |
| PJSC TATNEFT S/ADR (OAOFY) | 49 | 0.00% | 22% |
| Earthstone Energy, Inc. Class A (ESTE) | 48 | +0.48% | 62% |
| LAREDO OIL INC (LRDC) | 47 | 0.00% | 26% |
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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How the numbers are made.
How is Enerplus Corporation's median reaction calculated?
Every labeled ERF 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 48 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. 61% of ERF'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 ERF'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.