SpaceX $8 Billion Spectrum Deal Sends AT&T Toward Worst Session Since 2000

SpaceX agreed to acquire 100% of Grain Management's nationwide 800 MHz low-band wireless spectrum portfolio for approximately $8 billion in cash, announced October 8, 2026, setting off one of the sharpest 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. SpaceX Chief Operating Officer Gwynne Shotwell signaled plans to build out land-based infrastructure, including cell towers and small cell nodes, alongside the existing satellite network.

AT&T fell approximately 10% to 11% on the session, on pace for its worst day since 2000, while T-Mobile dropped roughly 12% to 13%, its steepest decline since 2013, and Verizon shed close to 10% to 11%. The S&P 500 Telecommunication Services index fell 8.5% on the day and has now lost 16% over the trailing 30 days. Bonds issued by AT&T and Verizon also weakened. Options activity in AT&T surged, with 234,259 contracts traded by midday. SpaceX shares rose 4.12% to $167.18 in premarket trade.

The competitive alarm centers on 800 MHz low-band spectrum, which penetrates buildings, the key physical barrier that had previously prevented satellite services from threatening indoor mobile coverage. Analysts at Barron's and on Wall Street argued the selloff represents a buying opportunity, noting SpaceX still faces significant deployment and profitability hurdles before it can seriously challenge the three major carriers. Tower companies including American Tower, Crown Castle, and SBA Communications moved higher on expectations that SpaceX would need to lease or build terrestrial infrastructure to support the new network. The broader market finished modestly higher, with the S&P 500 gaining 0.29%, the Nasdaq rising 0.55%, and the Dow adding 0.13%, as technology shares recovered from a prior session selloff.