York Space Systems Inc. (YSS)
YSS moved a median of -0.13% 30 minutes after news, and -0.11% by the close. How YSS actually reacts to news — the realized, point-in-time move the market made, measured across 398 labeled events over the last three years with zero look-ahead.
YSS’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | -0.27% | 44% | 378 |
| 30-min | -0.13% | 48% | 378 |
| 60-min | -0.45% | 42% | 378 |
| to close | -0.11% | 42% | 378 |
| Middle 50% of YSS reactions | -1.21% to +1.25% |
|---|---|
| Median reaction (30-min) | -0.13% |
| Measured reactions | 398 |
Half of all York Space Systems Inc. news events land between -1.21% and +1.25% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How YSS reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst downgrades | 11 | -3.30% | 18% | -2.39% |
| Coverage initiations | 38 | -2.09% | 16% | +1.57% |
| Rating reiterations | 22 | +0.08% | 55% | +2.65% |
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 YSS ranks against every other measured name →
That’s how YSS usually reacts — get an email when it moves on news →Email me when YSS moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to YSS's baseline. Nothing else.
Recent YSS events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| YSS Loss Notice: York Space Investors are Reminded of the October 30 Court Deadline – Contact BFA Law if You Lost Money | Press release | GlobeNewswire | +1.20% | — | |
| York Space Systems, Inc. Sued for Securities Law Violations - Contact the DJS Law Group to Discuss Your Rights - YSS | Press release | PR Newswire | +1.20% | — | |
| York Space Systems, Inc. Sued for Securities Law Violations - Contact the DJS Law Group to Discuss Your Rights - YSS | Press release | PR Newswire | -0.47% | -6.74% | |
| York Space Systems Awarded Two Space Force Space Data Network Task Orders | Press release | Business Wire | +0.35% | -3.80% | |
| York Space Systems Expands Austin Presence with New Office | Press release | Business Wire | -1.10% | -0.55% | |
| York Space Systems Expands into GEO to Support Space Domain Awareness Missions | Press release | Business Wire | -2.99% | -5.25% | |
| York Space Systems and ATLAS Space Operations Activate New Antenna in Mwulire, Rwanda, Doubling Contact Capacity at Its Equatorial Ground Station | Press release | Business Wire | -0.66% | -3.60% | |
| Important Notice to Long-Term Shareholders of FuelCell Energy, Inc. (NASDAQ: FCEL); Insulet Corporation (NASDAQ: PODD); Papa John's International, Inc. (NASDAQ: PZZA); and York Space Systems Inc. (NYSE: YSS): Grabar Law Office is Investigating Claims on | Press release | GlobeNewswire | -2.48% | -2.16% | |
| York Space Systems’ Flight-Proven Platforms Selected by Tomorrow.io for DeepSky Early Warning Constellation | Press release | Business Wire | -2.01% | -9.42% | |
| YSS Lawsuit Alert: York Space Systems Investors Face October 30 Deadline After 10% Stock Drop Tied to Satellite Software Issues | Press release | PR Newswire | -1.90% | -0.11% | |
| York Space Systems (NYSE:YSS) Shares Fall 10% Following Satellite Software Issues -- Investors with Losses Notified to Contact BFA Law before October 30 Deadline | Press release | GlobeNewswire | -1.90% | -0.11% | |
| York Space Systems Introduces New Platform Purpose-Built for Very Low Earth Orbit | Press release | Business Wire | -2.52% | -0.69% | |
| York Space Systems, Inc. Sued for Securities Law Violations - Contact the DJS Law Group to Discuss Your Rights - YSS | Press release | Business Wire | -2.52% | -0.69% | |
| York Space Systems to Present at Jefferies Global Industrials Conference | Press release | Business Wire | -0.11% | -2.29% | |
| York Space Systems Selected for U.S. Space Force Space Data Network | Press release | Business Wire | -1.20% | -6.80% | |
| York Space Systems Selected for U.S. Space Force NITE-STAR Contract to Support National Space Test and Training Complex | Press release | Business Wire | -3.17% | +1.76% | |
| Form 10-Q York Space Systems Inc. For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | -1.41% | +8.65% | |
| Form 8-K York Space Systems Inc. For: Aug 13 | SEC filing · Form 8-K | SEC EDGAR | -1.41% | +8.65% | |
| York Space Systems Reports Second Quarter 2026 Results | Press release | Business Wire | -1.41% | +8.65% | |
| Form 8-K York Space Systems Inc. For: Jul 30 | SEC filing · Form 8-K | SEC EDGAR | -5.58% | -16.23% | |
| York Space Systems Announces Chief Financial Officer Transition | Press release | Business Wire | -5.58% | -16.23% | |
| Lowey Dannenberg, P.C. is Investigating York Space Systems, Inc. (NYSE: YSS) for Potential Violations of the Federal Securities Laws | Press release | GlobeNewswire | +0.45% | -1.80% | |
| York Space Systems to Release Second Quarter 2026 Results on August 13, 2026 | Press release | Business Wire | -2.77% | +1.73% | |
| York Space Systems First to Deploy Second Layer of T1TL Transport System, Confirms Health of 21 Additional Satellites on Orbit Within Hours | Press release | Business Wire | -1.54% | -4.18% | |
| Lowey Dannenberg, P.C. is Investigating York Space Systems, Inc. (NYSE: YSS) for Potential Violations of the Federal Securities Laws | Press release | GlobeNewswire | -0.14% | +0.57% | |
| York Space Systems' Second Tactical Communications Satellite Lot Ready for Launch | Press release | Business Wire | -1.43% | -2.73% | |
| York Space Systems Completes Acquisition of ALL.SPACE, Delivering Assured Communications and Positioning in Contested Environments | Press release | Business Wire | +3.74% | -5.41% | |
| Lowey Dannenberg, P.C. is Investigating York Space Systems, Inc. (NYSE: YSS) for Potential Violations of the Federal Securities Laws | Press release | GlobeNewswire | -0.69% | -0.99% | |
| York Space Systems, Inc. (NYSE: YSS) Investigated for Potential Violations of the Federal Securities Laws by Lowey Dannenberg, P.C. | Press release | GlobeNewswire | -0.18% | -1.46% | |
| York Space Systems, Inc. (NYSE: YSS) Investigated for Potential Violations of the Federal Securities Laws by Lowey Dannenberg, P.C. | Press release | GlobeNewswire | -0.04% | +1.61% | |
| Lowey Dannenberg, P.C. is Investigating York Space Systems, Inc. (NYSE: YSS) for Potential Violations of the Federal Securities Laws | Press release | GlobeNewswire | -0.16% | -4.50% | |
| York Space Systems Completes Successful Dragoon Mission Test Objectives | Press release | Business Wire | -2.01% | -14.08% | |
| York Space Systems Awarded New U.S. Government Contract Supporting Critical National Security Priorities | Press release | Business Wire | -0.49% | -6.57% | |
| ALL.SPACE Awards $8.2M Production Order to Sivers Semiconductors for Ka-Band Beamforming ICs | Press release | PR Newswire | +0.49% | -8.92% | |
| York Space Systems Completes Second Production Lot of Tactical Communication Satellites for Launch this Summer | Press release | Business Wire | -1.50% | -0.72% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages York Space Systems, Inc. (YSS) Shareholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | -0.37% | -9.46% | |
| Form 8-K/A York Space Systems Inc. For: May 15 | SEC filing · Form 8-K | SEC EDGAR | -0.76% | -2.40% | |
| York Space Systems Closes Acquisition of Solestial, U.S.-Sourced Space Solar Capability | Press release | Business Wire | -0.76% | -2.40% | |
| Bronstein, Gewirtz & Grossman, LLC Is Investigating York Space Systems, Inc. (YSS) And Encourages Shareholders to Connect | Press release | ACCESS Newswire | -0.47% | +0.08% | |
| Bronstein, Gewirtz & Grossman, LLC Initiates an Investigation into Allegations Against York Space Systems, Inc. (YSS) And Encourages Shareholders to Reach Out | Press release | ACCESS Newswire | +0.08% | -2.00% | |
| Bronstein, Gewirtz & Grossman, LLC Announces an Investigation Against York Space Systems, Inc. (YSS) and Encourages Shareholders to Learn More About the Investigation | Press release | ACCESS Newswire | -0.46% | +1.27% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages York Space Systems, Inc. (YSS) Stockholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | -2.99% | -7.66% | |
| York Space Systems, Inc. (YSS) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Shareholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | +1.48% | +0.69% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages York Space Systems, Inc. (YSS) Stockholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | +0.63% | -4.46% | |
| Bronstein, Gewirtz & Grossman, LLC Initiates an Investigation into Allegations Against York Space Systems, Inc. (YSS) And Encourages Stockholders to Reach Out | Press release | ACCESS Newswire | +0.71% | +5.33% | |
| Bronstein, Gewirtz & Grossman, LLC Is Investigating York Space Systems, Inc. (YSS) And Encourages Stockholders to Connect | Press release | ACCESS Newswire | +0.71% | +5.33% | |
| York Space Systems to Present at Jefferies Space Virtual Summit | Press release | Business Wire | +1.54% | +1.65% | |
| York Space Systems, Inc. (YSS) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Stockholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | -0.42% | +0.83% | |
| Bronstein, Gewirtz & Grossman, LLC Announces an Investigation Against York Space Systems, Inc. (YSS) and Encourages Stockholders to Learn More About the Investigation | Press release | ACCESS Newswire | +1.00% | +1.25% | |
| Form 8-K York Space Systems Inc. For: May 15 | SEC filing · Form 8-K | SEC EDGAR | -3.38% | +1.02% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the YSS section they belong to.
Where else YSS is measured.
YSS earnings → · Analyst actions → · SEC filings →
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Every name we’ve measured, in one place.
How the numbers are made.
How is York Space Systems Inc.'s median reaction calculated?
Every labeled YSS 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 398 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 YSS'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 YSS'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.