Boeing's FAA 737 MAX 10 certification hold led a risk-off give-back across the space names, while 5N Plus extended gains on its US germanium grant and space-solar expansion.

5N Plus (FPLSF) led the vertical Monday, up 3.7% to $21.74 on the space-grade-solar-and-power chokepoint — continuation of the move that followed its US$18.1 million US-government grant to expand germanium recovery and refining at St. George, Utah, alongside a planned 25% H2 2026 capacity lift at its AZUR SPACE solar-cell unit. Germanium substrates and space-grade triple-junction cells are the power rung for satellites, and 5N Plus is the Western supply-chain answer to Chinese germanium export controls — a chokepoint the market rewarded even as the rest of the basket sold off.

The laggard was Boeing (BA), down 6.9% to $184.39 — its worst day in roughly a year and a half — on roughly 2.8 times its average volume, after US regulators put 737 MAX 10 certification on hold over a flight-guidance software glitch that could impair an automated navigation feature during landing. Within this vertical Boeing is the Spectrolab space-solar prime, but the read is honest: this was a company-wide commercial-jet certification story, not a space-segment event, and it dragged the whole share line.

The broader tape was a risk-off give-back across the space rungs as the 10-year yield hit 5.24% and US-Iran tensions lifted oil. Atomic clocks and space-PNT: Frequency Electronics (FEIM) −6.7% to $82.49. Propulsion and propellants: Karman (KRMN) −5.6%. Ground segment and direct-to-device: SES (SGBAF) −5.7%. Earth observation: Planet Labs (PL) −3.8% and Redwire (RDW) −3.6%. The launch-and-reusability rung was more resilient — Rocket Lab (RKLB) −2.4%, Intuitive Machines (LUNR) −2.6%, and SpaceX's tracking line (SPCX) −2.2%.

The catalysts ahead are launch- and transaction-driven. Satellogic targets its first AI-first constellation satellite launch around October 31, and Rocket Lab's Neutron medium-lift maiden launch window runs through Q4. L3Harris's Rocketdyne majority sale to AE Industrial is expected to close in H2 2026, and SpaceX's IPO lockup fully expires December 9. Most directly for 5N Plus and the power rung: China's suspension of its germanium and gallium export ban to the US expires November 27 — the event that defines the Western space-solar supply squeeze.