Archer Aviation Inc. Class A (ACHR)
ACHR moved a median of -0.10% 30 minutes after news, and -0.34% by the close. How ACHR actually reacts to news — the realized, point-in-time move the market made, measured across 779 labeled events over the last three years with zero look-ahead.
ACHR’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 48% | 778 |
| 30-min | -0.10% | 46% | 778 |
| 60-min | -0.25% | 45% | 778 |
| to close | -0.34% | 44% | 766 |
| Middle 50% of ACHR reactions | -1.23% to +0.93% |
|---|---|
| Median reaction (30-min) | -0.10% |
| Measured reactions | 779 |
Half of all Archer Aviation Inc. Class A news events land between -1.23% and +0.93% at 30 minutes.
Reaction stats as of 2026-08-31. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
Email me when ACHR moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to ACHR's baseline. Nothing else.
Recent ACHR events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Archer, BETA Plan to Bring Air Taxi Charging Infrastructure to Texas to Support TxDOT’s eIPP Operations with America’s Consortium for Electric Skyways | Press release | Business Wire | +1.31% | +1.30% | |
| Archer's 'No Roads' Tour Takes Off By Completing Midnight's Piloted Roundtrip Flight From Salinas to Hollister | Press release | Business Wire | +0.12% | +2.82% | |
| Form 8-K Archer Aviation Inc. For: Sep 01 | SEC filing · Form 8-K | SEC EDGAR | +0.12% | +2.82% | |
| Archer Launches ‘No Roads’ Flight Tour As Part Of Its Participation In White House’s Air Taxi Pilot Program and Preparation for LA28 Games | Press release | Business Wire | +1.46% | -1.20% | |
| AEG and Archer to Develop Vertiport at L.A. LIVE, Expanding Archer's Planned Los Angeles Air Taxi Network Ahead of the LA28 Games | Press release | Business Wire | -1.93% | -2.25% | |
| Form 8-K Archer Aviation Inc. For: Aug 18 | SEC filing · Form 8-K | SEC EDGAR | +0.24% | +2.38% | |
| Archer to Shape Physical AI Future of Aerospace and Defense with Acquisition of Boeing’s Wisk Aero, Insitu and SkyGrid Subsidiaries; Boeing to Invest in Archer and Collaborate | Press release | Business Wire | -1.02% | — | |
| Form 8-K Archer Aviation Inc. For: Aug 09 | SEC filing · Form 8-K | SEC EDGAR | -1.02% | — | |
| Archer’s ZEE AI Foundation Model Achieves Frontier Breakthrough for Aviation Safety: Demonstrating Real-Time 'Prediction' of Airport Surface Trajectories | Press release | Business Wire | -1.42% | -1.70% | |
| Archer’s Midnight Completes City-to-City Flights in California Ahead of White House’s eIPP | Press release | Business Wire | +1.07% | +3.64% | |
| Archer To Report Second Quarter 2026 Operating Update and Financial Results on August 10, 2026 | Press release | Business Wire | -0.83% | +0.21% | |
| Introducing Halo: Archer’s Commercial Variant of Dual-Use Autonomous VTOL Aircraft Platform Developed With Anduril | Press release | Business Wire | +1.13% | -2.45% | |
| Anduril and Archer Unveil Jointly-Developed Autonomous VTOL Platform For Commercial and Defense Applications | Press release | Business Wire | +4.12% | +15.18% | |
| Archer Aviation, BETA Technologies and Macquarie Capital Launch ACES: America’s Consortium for Electric Skyways to Bring Interoperable Charging to 250+ Aviation Sites Across America by 2030 | Press release | Business Wire | -0.32% | -4.87% | |
| Archer Announces Zee, AI Foundation Model Purpose-Built for Aviation, a Key Pillar of Its Physical AI Strategy | Press release | Business Wire | +2.75% | -2.45% | |
| Form 8-K Archer Aviation Inc. For: Jun 26 | SEC filing · Form 8-K | SEC EDGAR | +0.10% | +2.50% | |
| Form DEFA14A Archer Aviation Inc. | SEC filing · Form DEFA14A | SEC EDGAR | -0.67% | -2.88% | |
| Form 8-K Archer Aviation Inc. For: May 14 | SEC filing · Form 8-K | SEC EDGAR | -1.81% | -1.79% | |
| Archer Announces First Quarter 2026 Results, Highlighting Record FAA Certification Progress With Initial US Operations Expected In 2026 | Press release | Business Wire | +1.97% | +0.79% | |
| Form 10-Q Archer Aviation Inc. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +1.97% | +0.79% | |
| Form 8-K Archer Aviation Inc. For: May 11 | SEC filing · Form 8-K | SEC EDGAR | +1.97% | +0.79% | |
| UAE Regulator And Archer Move To Streamlined Approach for Certifying Midnight in the UAE | Press release | Business Wire | +1.26% | -1.10% | |
| Form ARS Archer Aviation Inc. For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | +0.54% | +2.13% | |
| Form DEF 14A Archer Aviation Inc. For: Jun 26 | SEC filing · Form DEF | SEC EDGAR | +0.54% | +2.13% | |
| Form DEFA14A Archer Aviation Inc. | SEC filing · Form DEFA14A | SEC EDGAR | +0.54% | +2.13% | |
| Archer To Report First Quarter 2026 Operating Update and Financial Results on May 11, 2026 | Press release | Business Wire | +0.17% | -0.34% | |
| Form PRE 14A Archer Aviation Inc. For: Jun 26 | SEC filing · Form PRE | SEC EDGAR | +0.06% | +1.66% | |
| Hopscotch Air Collaborates With Archer on Testing for Future Air Mobility Technology and Operations | Press release | GlobeNewswire | +0.00% | -2.95% | |
| Beyond Legacy Defense: The New Blueprint for Scalable Aerospace Growth | Press release | PR Newswire | -0.44% | -3.14% | |
| Form 8-K Archer Aviation Inc. For: Mar 13 | SEC filing · Form 8-K | SEC EDGAR | -0.42% | -4.00% | |
| Form 8-K Archer Aviation Inc. For: Mar 09 | SEC filing · Form 8-K | SEC EDGAR | +0.48% | -3.83% | |
| Archer’s US Air Taxi Operations Take Major Step Forward as Florida, New York and Texas Selected for White House Pilot Program | Press release | Business Wire | +1.66% | +2.76% | |
| Form 8-K Archer Aviation Inc. For: Mar 05 | SEC filing · Form 8-K | SEC EDGAR | +0.72% | -0.16% | |
| Archer Announces Fourth Quarter and Full Year 2025 Results, US and UAE Air Taxi Pilot Programs On-Track for 2026 | Press release | Business Wire | -6.81% | -8.45% | |
| Form 10-K Archer Aviation Inc. For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -6.81% | -8.45% | |
| Form 8-K Archer Aviation Inc. For: Mar 02 | SEC filing · Form 8-K | SEC EDGAR | -6.81% | -8.45% | |
| Form S-8 Archer Aviation Inc. | SEC filing · Form S-8 | SEC EDGAR | -6.81% | -8.45% | |
| Industry-First: Archer to Bring Starlink Onboard Midnight Air Taxis | Press release | Business Wire | -1.61% | -0.56% | |
| Form 8-K Archer Aviation Inc. For: Feb 23 | SEC filing · Form 8-K | SEC EDGAR | -1.64% | -2.47% | |
| Archer Selects Bristol As Home For Its UK Engineering Hub | Press release | Business Wire | -0.51% | +5.24% | |
| Archer To Report Fourth Quarter and Full Year 2025 Operating Update and Financial Results on March 2, 2026 | Press release | Business Wire | -0.74% | -0.88% | |
| Form 8-K Archer Aviation Inc. For: Jan 23 | SEC filing · Form 8-K | SEC EDGAR | -1.23% | -0.74% | |
| Form 8-K Archer Aviation Inc. For: Jan 22 | SEC filing · Form 8-K | SEC EDGAR | -2.03% | -4.86% | |
| Republic of Serbia Aims to Catalyze European Adoption of Air Taxis, Selects Archer as Preferred Partner | Press release | Business Wire | +0.63% | -3.09% | |
| Archer Aviation Inc. (ACHR) Under Investigation by Highful Law PLLC | Press release | Business Wire | +0.42% | +0.68% | |
| Archer To Build Next Wave of Aviation AI Technology With NVIDIA IGX Thor | Press release | Business Wire | +1.53% | +2.71% | |
| Archer Moves to Launch Air Taxi Trials In U.S. Cities Under White House Executive Order as DOT Unveils National AAM Strategy | Press release | Business Wire | +0.98% | -0.72% | |
| Archer Announces Plans for UK Engineering Hub, Hires Veteran British eVTOL Engineering Leader | Press release | Business Wire | +3.27% | +2.32% | |
| Form 8-K Archer Aviation Inc. For: Dec 08 | SEC filing · Form 8-K | SEC EDGAR | +1.51% | +3.13% | |
| Saudi Arabia’s General Authority of Civil Aviation Advances Archer’s Pathway for Electric Air Taxi Deployment | Press release | Business Wire | -1.46% | -2.10% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the ACHR section they belong to.
Where else ACHR is measured.
ACHR earnings → · Analyst actions → · SEC filings →
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How the numbers are made.
How is Archer Aviation Inc. Class A's median reaction calculated?
Every labeled ACHR 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 779 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. 46% of ACHR'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 2026-08-31.
Does ACHR'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.