The space basket cratered — Comtech led the wreckage and the satellite names sold off hard — with rad-hard silicon the only green corner, riding the chip rally rather than any space catalyst.

The only green in the space map was rad-hard silicon, and it was riding the semiconductor tape, not a space catalyst. STMicroelectronics (STM) led at +4.2% to $74.88, with Texas Instruments (+2.9%) and Microchip (+1.8%) alongside — the radiation-hardened and rad-tolerant components chokepoint, the chips that survive the orbital environment and that every satellite bus and payload must source. Their move tracked the broad chip rally that Micron's record memory quarter set off, a reminder that the space supply chain's most defensible link is also its most exposed to the wider semiconductor cycle. The lone space-native gainer was Karman (KRMN +3.2%), on the propulsion-and-propellants side.

Comtech (CMTL) was the worst, down 12.8% to $2.05, extending a post-earnings collapse: after its mid-June fiscal-Q3 print, analysts gutted the FY2027 revenue outlook (toward a ~31% decline), and the ground-segment name has bled steadily since, even after selling its satellite-and-space business to Gilat for $157.5M. It maps to the ground-segment chokepoint — the modems, teleport and network gear that close the link between orbit and the ground — but trades as a distressed micro-cap on balance-sheet and going-concern questions rather than on the chokepoint's strategic value. It led a broad wipeout of the space-native names: Satellogic (−9.1%), Frequency Electronics (−7.0%, atomic-clocks/PNT), Spire (−6.7%), Rocket Lab (−5.5%, launch), Redwire (−5.1%), MDA Space (−4.1%), Viasat (−3.6%), AST SpaceMobile (−3.5%) and BlackSky (−3.4%).

The session was a textbook risk-off unwind in a high-beta basket — the Nasdaq fell for a fourth straight day — and the space pure-plays, almost all pre-profit and capital-hungry, were the first sold. The chokepoint read is unchanged: the launch, earth-observation, ground-segment and in-space-infrastructure links remain real and capacity-constrained, but their listed proxies trade as momentum vehicles, swinging hardest when the speculative end of the market contracts. The rad-hard-silicon strength was the tell — the part of the space chain whose demand is underwritten by a broader semiconductor cycle held, while everything dependent on its own narrative gave way.

The catalyst calendar is led by Frequency Electronics' Q4/FY2026 (July 9), the first hard print in the basket, followed by the July earnings wave: Texas Instruments (July 21), L3Harris, STMicroelectronics and Teledyne (July 23) and Iridium (July 24). Rocket Lab's Q2 (Aug 6) — its first full quarter owning Mynaric and CONDOR — is the cleanest read on the optical-terminals and launch chokepoints, while the SDA Tranche 2 Transport Layer launches begin around September 1 and Astroscale's Space Force refueler heads to GEO mid-September.