Eiger BioPharmaceuticals, Inc. (EIGR)
EIGR moved a median of -1.57% 30 minutes after news, and -7.15% by the close. How EIGR actually reacts to news — the realized, point-in-time move the market made, measured across 45 labeled events over the last three years with zero look-ahead.
EIGR’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | -4.37% | 16% | 38 |
| 30-min | -1.57% | 32% | 38 |
| 60-min | -2.79% | 31% | 39 |
| to close | -7.15% | 31% | 39 |
| Middle 50% of EIGR reactions | -12.07% to +0.03% |
|---|---|
| Median reaction (30-min) | -1.57% |
| Measured reactions | 45 |
Half of all Eiger BioPharmaceuticals, Inc. news events land between -12.07% and +0.03% 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 EIGR moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to EIGR's baseline. Nothing else.
Recent EIGR events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form 8-K Eiger BioPharmaceuticals For: May 03 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Sentynl Therapeutics Announces Global Acquisition of Zokinvy® (Lonafarnib) for Treatment of Hutchinson-Gilford Progeria Syndrome from Eiger BioPharmaceuticals | Press release | PR Newswire | — | — | |
| Form 8-K Eiger BioPharmaceuticals For: Apr 26 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Form 10-K/A Eiger BioPharmaceuticals For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | — | — | |
| Form 10-K Eiger BioPharmaceuticals For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | +0.99% | -5.94% | |
| Form 8-K Eiger BioPharmaceuticals For: Apr 01 | SEC filing · Form 8-K | SEC EDGAR | +0.54% | +22.16% | |
| Eiger BioPharmaceuticals Files for Voluntary Chapter 11 Protection | Press release | GlobeNewswire | -9.99% | -40.99% | |
| Form 8-K Eiger BioPharmaceuticals For: Mar 31 | SEC filing · Form 8-K | SEC EDGAR | -10.99% | -7.80% | |
| Form NT 10-K Eiger BioPharmaceuticals For: Dec 31 | SEC filing · Form NT | SEC EDGAR | -10.99% | -7.80% | |
| Form S-8 POS Eiger BioPharmaceuticals | SEC filing · Form S-8 | SEC EDGAR | -10.99% | -7.80% | |
| Form 8-K Eiger BioPharmaceuticals For: Mar 08 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -10.88% | |
| Form 8-K Eiger BioPharmaceuticals For: Jan 18 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -1.16% | |
| Eiger and Partner, AnGes, Receive Approval for Zokinvy® (lonafarnib) for Hutchinson- Gilford Progeria Syndrome and Processing-Deficient Progeroid Laminopathies in Japan | Press release | PR Newswire | -1.91% | -5.07% | |
| Form 8-K Eiger BioPharmaceuticals For: Jan 05 | SEC filing · Form 8-K | SEC EDGAR | -7.87% | +6.24% | |
| Eiger BioPharmaceuticals, Inc. Announces 1-for-30 Reverse Stock Split | Press release | PR Newswire | -3.10% | +3.19% | |
| Form 8-K Eiger BioPharmaceuticals For: Dec 28 | SEC filing · Form 8-K | SEC EDGAR | -3.10% | +3.19% | |
| Form DEF 14A Eiger BioPharmaceuticals For: Dec 28 | SEC filing · Form DEF | SEC EDGAR | -5.64% | -30.16% | |
| Form PRE 14A Eiger BioPharmaceuticals For: Dec 28 | SEC filing · Form PRE | SEC EDGAR | +6.45% | +5.00% | |
| Form 8-K Eiger BioPharmaceuticals For: Nov 10 | SEC filing · Form 8-K | SEC EDGAR | +0.57% | +3.71% | |
| Eiger BioPharmaceuticals Reports Third Quarter 2023 Financial Results and Provides Business Update | Press release | PR Newswire | -3.00% | -10.03% | |
| Form 10-Q Eiger BioPharmaceuticals For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | -3.00% | -10.03% | |
| Form 8-K Eiger BioPharmaceuticals For: Nov 09 | SEC filing · Form 8-K | SEC EDGAR | -3.00% | -10.03% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the EIGR section they belong to.
Where else EIGR is measured.
EIGR earnings → · Analyst actions → · SEC filings →
Other Healthcare names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| DEMANT HLDG U/ADR (WILYY) | 48 | 0.00% | 18% |
| HLS THERAPEUTICS INC (HLTRF) | 47 | 0.00% | 24% |
| OTSUKA HOLDINGS CO ADR (OTSKY) | 45 | -0.06% | 39% |
| Cipher Pharmaceuticals Inc (CPH_TSE) | 43 | -0.35% | 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.
All Healthcare names, measured the same way →
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How the numbers are made.
How is Eiger BioPharmaceuticals, Inc.'s median reaction calculated?
Every labeled EIGR 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 45 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. 32% of EIGR'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 EIGR'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.