Geron Corporation (GERN)
GERN moved a median of -0.28% 30 minutes after news, and 0.00% by the close. How GERN actually reacts to news — the realized, point-in-time move the market made, measured across 949 labeled events over the last three years with zero look-ahead.
GERN’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 47% | 946 |
| 30-min | -0.28% | 41% | 947 |
| 60-min | -0.36% | 42% | 947 |
| to close | 0.00% | 43% | 946 |
| Middle 50% of GERN reactions | -1.31% to +1.23% |
|---|---|
| Median reaction (30-min) | -0.28% |
| Measured reactions | 949 |
Half of all Geron Corporation news events land between -1.31% and +1.23% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How GERN reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst downgrades | 13 | -0.01% | 46% | -2.24% |
| Coverage initiations | 18 | +0.78% | 50% | +1.61% |
| Rating reiterations | 47 | +0.04% | 55% | +0.67% |
Last 3 years, pulled 2026-09-21. Reaction = percent move vs. the price at the news timestamp. Counts and medians only. The same measurement runs across every name in the dataset. 3 further classes were observed with fewer than 10 measured events and are not published. See how GERN ranks against every other measured name →
That’s how GERN usually reacts — get an email when it moves on news →Email me when GERN moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to GERN's baseline. Nothing else.
Recent GERN events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Did Geron Corporation Insiders Breach their Fiduciary Duties to Shareholders? | Press release | PR Newswire | -0.41% | -0.41% | |
| Geron Corporation Announces Oral Presentations Highlighting Imetelstat at International Hematology Congresses in Europe and Asia | Press release | GlobeNewswire | -0.08% | +0.00% | |
| Did Geron Corporation Insiders Breach their Fiduciary Duties to Shareholders? | Press release | PR Newswire | -1.59% | -0.79% | |
| Geron Corporation Reports Inducement Grants Under Nasdaq Listing Rule 5635(c)(4) | Press release | GlobeNewswire | -0.77% | +0.00% | |
| Did Geron Corporation Insiders Breach their Fiduciary Duties to Shareholders? | Press release | PR Newswire | +0.00% | +0.00% | |
| Geron to Present at Upcoming Investor Conferences | Press release | GlobeNewswire | +3.38% | +7.43% | |
| Geron Corporation Reports Inducement Grants Under Nasdaq Listing Rule 5635(c)(4) | Press release | GlobeNewswire | -0.40% | +1.27% | |
| Form 8-K GERON CORP For: Aug 05 | SEC filing · Form 8-K | SEC EDGAR | -3.13% | -1.88% | |
| Form 10-Q GERON CORP For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | -3.13% | -1.88% | |
| Form S-8 GERON CORP | SEC filing · Form S-8 | SEC EDGAR | -3.13% | -1.88% | |
| Geron Corporation Reports Second Quarter 2026 Financial Results and Recent Business Highlights | Press release | GlobeNewswire | +6.93% | +18.98% | |
| Geron Corporation Reports Inducement Grants Under Nasdaq Listing Rule 5635(c)(4) | Press release | GlobeNewswire | +0.35% | +2.84% | |
| Geron Plans to Announce Second Quarter 2026 Financial Results on August 5, 2026 | Press release | GlobeNewswire | +0.42% | -2.08% | |
| Geron Corporation Reports Inducement Grant Under Nasdaq Listing Rule 5635(c)(4) | Press release | GlobeNewswire | -0.36% | +3.65% | |
| Geron Announces Appointment of Chinmaya Rath as Chief Business Officer | Press release | GlobeNewswire | -3.95% | -5.33% | |
| Geron Corporation Reports Inducement Grants Under Nasdaq Listing Rule 5635(c)(4) | Press release | GlobeNewswire | +3.13% | +4.69% | |
| Geron to Participate in the Goldman Sachs 47th Annual Global Healthcare Conference | Press release | GlobeNewswire | -1.86% | -3.20% | |
| Form 8-K GERON CORP For: May 20 | SEC filing · Form 8-K | SEC EDGAR | -0.79% | -1.57% | |
| Geron Corporation Reports Inducement Grants Under Nasdaq Listing Rule 5635(c)(4) | Press release | GlobeNewswire | +0.41% | -0.81% | |
| First Real-World Evidence Study of RYTELO® (imetelstat) in Lower-risk Myelodysplastic Syndromes (LR-MDS) to be Presented at EHA 2026 | Press release | GlobeNewswire | -0.08% | -1.14% | |
| Form 10-Q GERON CORP For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | -6.41% | |
| Geron Corporation Reports First Quarter 2026 Financial Results and Recent Business Highlights | Press release | GlobeNewswire | -3.31% | -4.82% | |
| Geron Plans to Present at Upcoming Investor Conferences | Press release | GlobeNewswire | +1.56% | +3.13% | |
| Geron Plans to Announce First Quarter 2026 Financial Results on May 6, 2026 | Press release | GlobeNewswire | -0.41% | +1.31% | |
| Geron Corporation Reports Inducement Grants Under Nasdaq Listing Rule 5635(c)(4) | Press release | GlobeNewswire | -1.94% | -3.23% | |
| Geron Corporation Reports Inducement Grant Under Nasdaq Listing Rule 5635(c)(4) | Press release | GlobeNewswire | -0.85% | -4.52% | |
| Geron Announces Appointment of Timothy Williams as Executive Vice President, Chief Legal Officer and Corporate Secretary | Press release | GlobeNewswire | +1.51% | +4.22% | |
| Form ARS GERON CORP For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | -3.31% | -5.53% | |
| Form DEF 14A GERON CORP For: May 20 | SEC filing · Form DEF | SEC EDGAR | -3.31% | -5.53% | |
| Form DEFA14A GERON CORP | SEC filing · Form DEFA14A | SEC EDGAR | -3.31% | -5.53% | |
| Geron to Participate in the 25th Annual Needham Virtual Healthcare Conference | Press release | GlobeNewswire | +1.81% | +5.42% | |
| Form 8-K GERON CORP For: Mar 25 | SEC filing · Form 8-K | SEC EDGAR | +0.01% | +0.00% | |
| Geron Announces Appointment of New Members to its Board of Directors | Press release | GlobeNewswire | +0.01% | +0.00% | |
| Geron Corporation Reports Inducement Grants Under Nasdaq Listing Rule 5635(c)(4) | Press release | GlobeNewswire | -1.96% | +1.31% | |
| Investors Eye Explosive Growth in Anti-Aging Therapies as Market Targets $420B Milestone | Press release | Canada Newswire | -0.33% | -4.64% | |
| Form 10-K GERON CORP For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -0.31% | -3.13% | |
| Form S-3ASR GERON CORP | SEC filing · Form S-3ASR | SEC EDGAR | -0.31% | -3.13% | |
| Form 8-K GERON CORP For: Feb 25 | SEC filing · Form 8-K | SEC EDGAR | -3.27% | +2.38% | |
| Geron Corporation Reports Fourth Quarter and Full Year 2025 Financial Results and Recent Business Highlights | Press release | GlobeNewswire | -3.27% | +2.38% | |
| Geron Plans to Present at Upcoming Investor Conferences | Press release | GlobeNewswire | +2.45% | -3.80% | |
| Geron Corporation Reports Inducement Grants Under Nasdaq Listing Rule 5635(c)(4) | Press release | GlobeNewswire | +0.26% | -1.03% | |
| Geron Plans to Announce Fourth Quarter and Full Year 2025 Financial Results on February 25, 2026 | Press release | GlobeNewswire | -0.86% | -0.62% | |
| Form 8-K GERON CORP For: Jan 12 | SEC filing · Form 8-K | SEC EDGAR | -2.59% | +5.93% | |
| Geron Corporation Provides 2026 Financial Guidance | Press release | GlobeNewswire | -2.59% | +5.93% | |
| Form 8-K GERON CORP For: Jan 05 | SEC filing · Form 8-K | SEC EDGAR | +0.38% | +0.00% | |
| Geron Corporation Reports Inducement Grants Under Nasdaq Listing Rule 5635(c)(4) | Press release | GlobeNewswire | +0.00% | -0.75% | |
| Form 8-K GERON CORP For: Dec 10 | SEC filing · Form 8-K | SEC EDGAR | +2.98% | +4.48% | |
| Geron Corporation Announces Strategic Restructuring Plan to Position the Company for Long-Term Value Creation | Press release | GlobeNewswire | +1.57% | +9.45% | |
| Geron Corporation Presents New Data at ASH 2025 Highlighting the Relationship Between Treatment-Emergent Cytopenias and Clinical Benefit of RYTELO® (Imetelstat) in Lower-Risk MDS | Press release | GlobeNewswire | +2.28% | -4.51% | |
| Blood Cancer Therapeutics Reach Critical Commercial and Clinical Inflection Points | Press release | PR Newswire | +0.00% | +0.00% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the GERN section they belong to.
Where else GERN is measured.
GERN earnings → · Analyst actions → · SEC filings →
Other Healthcare names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Antares Pharma, Inc. (ATRS) | 951 | 0.00% | 43% |
| Sage Therapeutics, Inc. (SAGE) | 951 | -0.14% | 41% |
| Intellia Therapeutics, Inc. (NTLA) | 948 | -0.24% | 45% |
| Biohaven Ltd. Common Shares (BHVN) | 944 | -0.27% | 45% |
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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Every name we’ve measured, in one place.
How the numbers are made.
How is Geron Corporation's median reaction calculated?
Every labeled GERN 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 949 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 GERN'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 GERN'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.