SpaceX $8 Billion Spectrum Deal Hammers AT&T, Verizon and T-Mobile While Humana Surges on Medicare Ratings

SpaceX agreed to acquire 100% of Grain Management's nationwide 800 MHz low-band wireless spectrum portfolio for approximately $8 billion in cash, announced on October 8, 2026, setting off one of the most significant single-day routs in telecom stocks in years. The deal covers up to 14 megahertz of paired 800 MHz spectrum and positions Starlink Mobile to operate as a full-scale U.S. mobile carrier, with SpaceX Chief Operating Officer Gwynne Shotwell indicating plans to build out land-based infrastructure including cell towers and small cell nodes alongside the satellite network.

The market reaction was severe. T-Mobile fell roughly 13%, its worst day since 2013. AT&T shed approximately 10%, on pace for its worst session since 2000, and Verizon dropped close to 10%, approaching its steepest decline since 2002. In premarket trading the losses were somewhat smaller, with T-Mobile down 6.5-7.8%, AT&T off 5.6-6.3%, and Verizon lower by 5.9%, but selling deepened through the session. SpaceX shares rose 4.12% to $167.18, boosted both by the deal and a fresh bullish Wall Street initiation. The transaction still requires FCC approval.

Tower infrastructure companies moved in the opposite direction, rising on expectations that a new entrant building out terrestrial coverage would need leased antenna sites. American Tower and SBA Communications both gained. Optical component makers also rallied after Lumentum disclosed that its AI data center components are completely sold out through early 2029, lifting shares roughly 6.2% and pulling up peers including Coherent and Applied Optoelectronics.

Humana jumped 15-17% after the Centers for Medicare and Medicaid Services released 2027 Medicare Advantage star ratings showing the insurer's largest contract, covering more than 2 million members, improved its rating above a key threshold that triggers higher federal payments. Baird upgraded the stock on the news. Delta Air Lines fell about 3.4% after cutting its full-year adjusted earnings per share forecast to a midpoint below the average analyst estimate. Apple slipped roughly 2% after a report that it cut component orders for the iPhone 18 Pro and iPhone 18 Pro Max on weaker-than-expected demand. American Express dropped 1.5% after federal regulators fined the company $350 million for failures in catching and reporting money laundering.