Acer Therapeutics Inc. (ACER)
How ACER 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.
ACER’s median reaction, across the day.
Half of all Acer Therapeutics Inc. news events land between -1.79% and +24.23% at 30 minutes.
Reaction stats as of 2026-08-18. Reaction = percent move vs. the price at the news timestamp.
Email me when ACER moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to ACER’s baseline. Nothing else.
Get “How ACER reacts to news” as a PDF.
A free one-page summary: ACER’s median reaction to news and the full breakdown by event type — the numbers on this page, in one page.
Recent ACER events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form 15-12G Acer Therapeutics Inc. | SEC filing · Form 15-12G | SEC EDGAR | — | — | |
| Form EFFECT Acer Therapeutics Inc. | SEC filing · Form EFFECT | SEC EDGAR | — | — | |
| Form 10-Q Acer Therapeutics Inc. For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | — | — | |
| Form 8-K Acer Therapeutics Inc. For: Nov 17 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Form POS AM Acer Therapeutics Inc. | SEC filing · Form POS | SEC EDGAR | — | — | |
| Form S-8 POS Acer Therapeutics Inc. | SEC filing · Form S-8 | SEC EDGAR | — | — | |
| Form NT 10-Q Acer Therapeutics Inc. For: Sep 30 | SEC filing · Form NT | SEC EDGAR | +0.00% | +2.50% | |
| Form 8-K Acer Therapeutics Inc. For: Nov 08 | SEC filing · Form 8-K | SEC EDGAR | +6.73% | +13.75% | |
| Form 8-K Acer Therapeutics Inc. For: Oct 31 | SEC filing · Form 8-K | SEC EDGAR | -1.46% | -0.89% | |
| Form DEFA14A Acer Therapeutics Inc. | SEC filing · Form DEFA14A | SEC EDGAR | -1.46% | -0.89% | |
| Leading Independent Proxy Advisory Firms ISS and Glass Lewis Recommend Acer Therapeutics Shareholders Vote "FOR" the Proposed Merger and Related Proposals | Press release | GlobeNewswire | -1.46% | -0.89% | |
| Form DEFA14A Acer Therapeutics Inc. | SEC filing · Form DEFA14A | SEC EDGAR | -2.91% | -3.48% | |
| Form DEFM14A Acer Therapeutics Inc. | SEC filing · Form DEFM14A | SEC EDGAR | +4.32% | +2.46% | |
| SHAREHOLDER INVESTIGATION: Halper Sadeh LLC Investigates AEL, HT, ABCM, ACER | Press release | PR Newswire | -1.32% | -1.32% | |
| SHAREHOLDER INVESTIGATION: Halper Sadeh LLC Investigates NXGN, SUM, AGE, ACER | Press release | Accesswire | +0.11% | +2.52% | |
| SHAREHOLDER INVESTIGATION: Halper Sadeh LLC Investigates ACER, AVID, NEWR, AEL | Press release | Accesswire | +2.74% | +6.54% | |
| ACER Stock Alert: Halper Sadeh LLC Is Investigating Whether the Sale of Acer Therapeutics Inc. Is Fair to Shareholders | Press release | Business Wire | -11.16% | +21.91% | |
| BRODSKY & SMITH SHAREHOLDER UPDATE: Notifying Investors of the Following Investigations: Acer Therapeutics Inc. (Nasdaq - ACER), Sovos Brands, Inc. (Nasdaq - SOVO), Computer Task Group, Incorporated (Nasdaq - CTG), Decibel Therapeutics, Inc. (Nasdaq - DBT | Press release | GlobeNewswire | -11.16% | +21.91% | |
| Form 8-K Acer Therapeutics Inc. For: Aug 28 | SEC filing · Form 8-K | SEC EDGAR | -11.16% | +21.91% | |
| Zevra Therapeutics to Acquire Acer Therapeutics, Expanding its Rare Disease Portfolio and Adding Commercial Product | Press release | GlobeNewswire | -11.16% | +21.91% | |
| Acer Therapeutics Reacquires Worldwide Development, Commercialization and Economic Rights to OLPRUVA™ from Relief Therapeutics, Excluding the Geographical Europe | Press release | GlobeNewswire | -11.16% | +21.91% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the ACER section they belong to.
More of the dataset.
ACER earnings → · Analyst actions → · SEC filings →
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How the numbers are made.
How is Acer Therapeutics Inc.'s median reaction calculated?
Every labeled ACER 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. 48% of ACER'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 2026-08-18.
Does ACER'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.