Eight billion for 14 MHz, and the carriers sold off

SpaceX said on Thursday 8 October that it has agreed to buy a nationwide portfolio of 800 MHz spectrum from Grain Management for Starlink Mobile, a deal that needs approval from the Federal Communications Commission. Financial terms were not disclosed, Via Satellite reported. The Wall Street Journal put the price at about $8bn, Reuters reported. Neither SpaceX nor Grain has confirmed that figure.

SpaceX described the holding as a "license portfolio of up to 14 megahertz of paired spectrum in the 800 MHz band", according to CNBC. The "up to" matters. When T-Mobile sold the same portfolio to Grain, the holding ranged from 4.85 MHz to 14 MHz depending on the area, and Grain described it as "approximately 14 MHz of blended spectrum depth nationwide", according to Telecom Review Americas. SpaceX said that "low-band spectrum addresses one of the key remaining technical gaps that will pave the way for Starlink Mobile", SDxCentral reported.

US carriers took the news badly on Friday. Verizon closed down 8.75 per cent, its worst day since July 2002, CNBC reported; T-Mobile fell 13.27 per cent and AT&T 9.81 per cent, their worst days since 2013 and 2000 respectively, by CNBC's count. NBC News gave a different benchmark for T-Mobile, calling it the worst day since 2011. SpaceX's own shares rose about 1 per cent on the day, according to CNBC.

Analysts split on how much has changed. Madison Rezaei of Bernstein wrote in a note that "Buying spectrum is not a commitment to build a nationwide network", adding that "this is the spectrum we thought SpaceX needed to make that option more credible - and less expensive", MarketWatch reported. JPMorgan wrote that the purchase made Starlink Mobile's long-term opportunity "more credible", according to CNBC, and Evercore ISI that SpaceX "now has the outline of a real network". T-Mobile's chief technology officer, John Saw, argued in a LinkedIn post that SpaceX remains short of spectrum and that indoor coverage and a competitive network take heavy capital, SDxCentral reported.

The regulator sounded relaxed. FCC Chairman Brendan Carr, whose agency will review the deal, told CNBC that competition in the spectrum market was "really good news for the American consumers". "It's not for us ultimately to pick winners and losers," he added. The FCC had approved SpaceX's plan for 15,000 direct-to-device satellites shortly before the announcement, Via Satellite reported.

The $8bn is a press figure, not a company figure. Grain bought the portfolio from T-Mobile for $2.9bn and 10 MHz of its own 600 MHz spectrum in 212 counties, according to Telecom Review Americas, after the FCC approved the swap on 1 July; Telecompetitor reported that Grain completed the purchase in August. By our arithmetic, $8bn is roughly 2.8 times the $2.9bn. That overstates Grain's markup, because it leaves out the 600 MHz spectrum Grain handed over, which has no published value in the material we have seen.

The sell-off then crossed the Pacific. Reuters reported on Monday that Telstra fell 2.5 per cent to a six-week low, TPG Telecom lost nearly 5 per cent in its worst day since early June, and Spark New Zealand slipped 1.8 per cent. Superloop fell 2.4 per cent and Aussie Broadband nearly 2 per cent. David Tuckwell, chief investment officer at ETF Shares in Sydney, told Reuters: "Investors fear the U.S. is just the first market, and that incumbents' biggest advantage, coverage, is losing its value." Citi said the purchase was likely to weigh on Telstra's share price but kept its buy rating, saying the deal "shows the importance of having terrestrial spectrum".

The market is pricing an option rather than a subscriber base. Spectrum is one input. SpaceX has no terrestrial network of the kind the incumbents run, and the FCC has yet to approve the transfer. Low-band spectrum such as 800 MHz carries further and reaches indoors better than the higher bands, which is the gap SpaceX says it is closing.

Satellite links were already moving into carriers' catalogues: Komposite reported in September that low-orbit connectivity had become a line item that carriers resell alongside fibre. Grain is expected to run a competitive solicitation for direct-to-device operators and file applications before the end of 2026, according to Telecom Review Americas. We have not seen a decision date for the SpaceX transfer.