SpaceX agreed to acquire Grain's 800 MHz spectrum for...

SpaceX's acquisition of spectrum triggered sharp fluctuations in telecom stocks, and the market reassessed the U.S. wireless landscape.

In after-hours trading on Friday, SpaceX shares rose 1.2%, while T-Mobile fell 13.2%, and Verizon fell about 10%. The reaction stems from investors 'repricing of the U.S. wireless market after SpaceX agreed to acquire national 800 MHz spectrum from Grain Management. AT&T shares also fell sharply, with the three traditional operators becoming the biggest losers in afternoon trading on the S & P 500 index. The reaction was evident long before the market opened: SpaceX shares rose about 4%, while T-Mobile, AT&T and Verizon all fell 5% to 7%. The proposed transaction was announced after the close of trading on Thursday.

Grain said SpaceX will acquire a 100% stake in its national 800 MHz portfolio, giving Starlink Mobile access to paired low-band spectrum up to 14 MHz. The deal still requires approval from the Federal Communications Commission (FCC). Neither company disclosed the purchase price. According to Reuters and The Wall Street Journal, citing people familiar with the matter, SpaceX is paying about $8 billion, so the figure is currently only hearsay rather than official confirmation.

800 MHz spectrum solves coverage issues, not capacity issues

The reason why investors are concerned about the 800 MHz band is its propagation characteristics. Compared to high-frequency bands, the spectrum at lower frequencies travels longer distances and can penetrate buildings, trees and other obstacles more effectively. SpaceX said the spectrum will be combined with Starlink Mobile's existing 2 GHz mid-band position to provide coverage that allows the service to reach ordinary mobile phone users via satellite and terrestrial infrastructure. According to Reuters, most existing U.S. smartphones already support the 800 MHz band, reducing the need for customers to purchase dedicated satellite handsets.

In addition, the deal comes a day after the FCC approved SpaceX's request to deploy 15,000 satellites to build its next-generation direct-connected device network. Elon Musk described the 800 MHz spectrum combination as the last piece of the spectrum puzzle needed to achieve "full mobile coverage in the United States." However, coverage is not the same as mobile network capacity. Wireless analyst Vish Nandlall pointed out that the spectrum "provides coverage, not a lot of capacity." While 14 MHz can improve signal range and indoor reception in rural areas, it alone is not enough to carry the high-density urban mobile traffic handled by AT&T, Verizon and T-Mobile.

Rival networks can cost as high as US$50 billion to US$130 billion

That is why the scale of Friday's telecom stock sell-off is controversial. Nandlall cited Bernstein's estimate that building a truly competitive U.S. mobile network would cost $50 billion to 130 billion. Previously, BNP Paribas estimated the cost at approximately US$100 billion based on tens of thousands of ground stations. SpaceX may not need to build all of this infrastructure itself. It can lease tower capacity, leverage roofs and small base stations, buy wholesale mobile capacity, or focus first on rural customers, vehicles and products that bundle Starlink broadband with mobile services. This possibility explains the opposite trend of Tower shares. Shares of American Tower, Crown Castle and SBA Communications rose 6.5% to 13.3% on Friday afternoon as investors considered whether a fourth national network would bring new tenants to existing infrastructure.

In fact, Grain only acquired the 800 MHz spectrum portfolio from T-Mobile in August this year. In that deal, T-Mobile received $2.9 billion in cash and Grain's 600 MHz license. The spectrum was reportedly resold for $8 billion just two months later, apparently giving the same spectrum a higher nominal value. Although the structures of the two deals are different and SpaceX's price has not yet been officially disclosed, this reflects the market's reassessment of the value of the spectrum.

SpaceX is involved in another capital-intensive business

While advancing the wireless business, investors are also debating how much money SpaceX will need on other projects. Earlier reports said SpaceX was negotiating a potential $40 billion Nvidia financing package related to artificial intelligence infrastructure, which means the company will again rely on large amounts of debt and capital. As SpaceX's public valuation rises, it has become the core of Elon Musk's personal wealth. Analysis shows that most of Musk's estimated wealth of US$1.028 trillion is tied to SpaceX shares rather than liquidity.

Friday's market reaction showed that investors are taking the competitive threat posed by Starlink Mobile seriously. However, the purchase of 800 MHz does not immediately give SpaceX the capacity, towers or economic benefits that traditional operators have. What it gives SpaceX is a more specific advantage: a national coverage that makes building such competitors more feasible.