Meta Platforms, Inc. - Class A (FB)
FB moved a median of -0.01% 30 minutes after news, and -0.07% by the close. How FB actually reacts to news — the realized, point-in-time move the market made, measured across 2,000+ labeled events over its full measured history with zero look-ahead.
FB’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | -0.02% | 48% | 1,993 |
| 30-min | -0.01% | 50% | 1,993 |
| 60-min | +0.02% | 51% | 1,993 |
| to close | -0.07% | 48% | 1,993 |
| Middle 50% of FB reactions | -0.52% to +0.48% |
|---|---|
| Median reaction (30-min) | -0.01% |
| Measured reactions | 2,000+ |
Half of all Meta Platforms, Inc. - Class A news events land between -0.52% and +0.48% 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 FB moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to FB's baseline. Nothing else.
Recent FB events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Meta to Announce Third Quarter 2026 Results | Press release | PR Newswire | +0.48% | +3.63% | |
| Meta Announces Quarterly Cash Dividend | Press release | PR Newswire | +0.93% | -0.78% | |
| Wexler Boley & Elgersma LLP Files Lawsuit Accusing Meta of Using Facebook and Instagram Images to Build Facial Recognition and Generative AI Systems Without Consent | Press release | PR Web | +0.03% | -1.09% | |
| Meta's Agreement With Bipartisan Attorneys General: Calling on TikTok and YouTube to Join Us in Supporting Teens | Press release | PR Newswire | +0.35% | +1.55% | |
| Form 10-Q Meta Platforms, Inc. For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +2.07% | +2.67% | |
| Form 8-K Meta Platforms, Inc. For: Jul 29 | SEC filing · Form 8-K | SEC EDGAR | +2.07% | +2.67% | |
| Meta Reports Second Quarter 2026 Results | Press release | PR Newswire | +2.07% | +2.67% | |
| Meta Announces New Strategic Venture with BlackRock to Develop Data Center in El Paso | Press release | PR Newswire | +0.20% | -0.43% | |
| Meta to Announce Second Quarter 2026 Results | Press release | PR Newswire | -0.47% | +2.61% | |
| Text Becomes AI Operating Layer for the Modern E-commerce Stack with New Shopify App and WhatsApp for Business Integration | Press release | PR Web | -0.47% | +0.85% | |
| QStar Integrates with BeeGFS to Reduce Storage Costs Through Intelligent Archiving | Press release | PR Web | -0.40% | -0.92% | |
| Form 8-K Meta Platforms, Inc. For: May 27 | SEC filing · Form 8-K | SEC EDGAR | -1.10% | -4.58% | |
| Meta Announces Quarterly Cash Dividend | Press release | PR Newswire | -0.69% | -0.23% | |
| JLens Urges Meta Shareholders to Take Action Against Online Hate and Vote FOR Proposal 8 at the Annual Meeting on May 27, 2026 | Press release | Business Wire | +0.03% | +0.91% | |
| Form SD Meta Platforms, Inc. | SEC filing · Form SD | SEC EDGAR | +0.49% | +0.55% | |
| Berger Montague PC Investigates Meta Platforms, Inc.'s Board of Directors for Breach of Fiduciary Duty (NASDAQ: META) | Press release | PR Newswire | -0.17% | +0.44% | |
| Form 8-K Meta Platforms, Inc. For: Apr 30 | SEC filing · Form 8-K | SEC EDGAR | -0.74% | -1.35% | |
| JLens Urges Meta Shareholders to Vote FOR Proposal 8 at the Company’s Annual Meeting on May 27, 2026 | Press release | Business Wire | -0.17% | +0.44% | |
| Form 10-Q Meta Platforms, Inc. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | -2.67% | -1.18% | |
| Form S-3ASR Meta Platforms, Inc. | SEC filing · Form S-3ASR | SEC EDGAR | -2.67% | -1.18% | |
| Berger Montague PC Investigates Meta Platforms, Inc.’s Board of Directors for Breach of Fiduciary Duty (NASDAQ: META) | Press release | GlobeNewswire | -0.19% | -0.50% | |
| Form 8-K Meta Platforms, Inc. For: Apr 29 | SEC filing · Form 8-K | SEC EDGAR | -2.67% | -1.18% | |
| Key Healthcare Featured as Leading Resource for Teen Social Media Addiction by France 24 | Press release | PR Web | +0.26% | +0.01% | |
| Meta Reports First Quarter 2026 Results | Press release | PR Newswire | -2.67% | -1.18% | |
| Focus Is the Moat: Cytation AI Outbuilds the Platforms on Trust by Refusing to Do Anything Else | Press release | PR Web | +0.06% | +1.17% | |
| Form ARS Meta Platforms, Inc. For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | -0.09% | +1.50% | |
| Form DEF 14A Meta Platforms, Inc. For: Dec 31 | SEC filing · Form DEF | SEC EDGAR | -0.09% | +1.50% | |
| Form DEFA14A Meta Platforms, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | -0.09% | +1.50% | |
| PhotoShelter Enables Brands to Share Content on TikTok with its Social Content Distribution Platform | Press release | PR Web | -0.45% | +0.10% | |
| Form 8-K Meta Platforms, Inc. For: Apr 08 | SEC filing · Form 8-K | SEC EDGAR | +0.07% | +0.69% | |
| Meta to Announce First Quarter 2026 Results | Press release | PR Newswire | -0.24% | +2.71% | |
| Meta to Participate in the Morgan Stanley Technology, Media & Telecom Conference | Press release | PR Newswire | +0.37% | +0.92% | |
| Uranium Demand Continues to Rise as AI Power Demand Rewrites the Nuclear Playbook | Press release | PR Newswire | +0.19% | +1.03% | |
| Meta Announces Quarterly Cash Dividend | Press release | PR Newswire | -0.98% | -0.62% | |
| Form 10-K Meta Platforms, Inc. For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -1.47% | +0.04% | |
| Form S-8 Meta Platforms, Inc. | SEC filing · Form S-8 | SEC EDGAR | -0.76% | -1.69% | |
| Form 8-K Meta Platforms, Inc. For: Jan 28 | SEC filing · Form 8-K | SEC EDGAR | -1.47% | +0.04% | |
| Meta Reports Fourth Quarter and Full Year 2025 Results | Press release | PR Newswire | -1.47% | +0.04% | |
| The AI Energy Supercycle: Striving to Secure 24/7 Power Infrastructure | Press release | GlobeNewswire | +0.02% | -1.01% | |
| Form 8-K Meta Platforms, Inc. For: Jan 12 | SEC filing · Form 8-K | SEC EDGAR | -0.11% | -0.69% | |
| Meta to Announce Fourth Quarter and Full Year 2025 Results | Press release | PR Newswire | -0.04% | +0.41% | |
| Form 8-K Meta Platforms, Inc. For: Dec 19 | SEC filing · Form 8-K | SEC EDGAR | +0.75% | +0.06% | |
| New National Social Media Study Shatters Myths About Gen Z Behavior, Political Polarization, and Platform Culture | Press release | PR Web | -0.11% | +0.14% | |
| Form 8-K Meta Platforms, Inc. For: Dec 05 | SEC filing · Form 8-K | SEC EDGAR | -0.40% | +0.23% | |
| Meta Announces Quarterly Cash Dividend | Press release | PR Newswire | -1.77% | -2.14% | |
| Avatarmy Launches Europe's First Fully Conversational AI Platform for Real Estate Brokers | Press release | PR Web | -0.54% | -0.54% | |
| DialLink Expands Messaging Capabilities by Adding WhatsApp Messaging to Its Business Phone Platform | Press release | PR Web | +0.04% | +0.67% | |
| Form 8-K Meta Platforms, Inc. For: Oct 30 | SEC filing · Form 8-K | SEC EDGAR | +0.93% | -0.11% | |
| Form 10-Q Meta Platforms, Inc. For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | -1.19% | -0.38% | |
| Form 8-K Meta Platforms, Inc. For: Oct 29 | SEC filing · Form 8-K | SEC EDGAR | -1.19% | -0.38% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the FB section they belong to.
Where else FB is measured.
FB earnings → · Analyst actions → · SEC filings →
Other Technology names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Citrix Systems, Inc. (CTXS) | 2,000+ | 0.00% | 50% |
| NIC (EGOV) | 2,000+ | 0.00% | 49% |
| Microsoft (MSFT) | 2,000+ | +0.02% | 53% |
| NVIDIA (NVDA) | 2,000+ | -0.01% | 50% |
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 Technology names, measured the same way →
Every ticker we measure the same way24
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Costco (COST)
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Mastercard (MA)
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Browse all tickers
Every name we’ve measured, in one place.
How the numbers are made.
How is Meta Platforms, Inc. - Class A's median reaction calculated?
Every labeled FB 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 2,000+ 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. 50% of FB'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 FB'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.