As AT&T, Verizon and T-Mobile shares fall, Wall Street assesses the growing SpaceX threat

The selloff in AT&T, Verizon and T-Mobile shares reflects a shift in how Wall Street is pricing competition in wireless connectivity. According to the source, the three carriers posted their worst daily declines in more than a decade as investors assessed the growing threat from SpaceX, the rocket and satellite company led by Elon Musk.

The market relevance lies in what SpaceX's satellite-based services could mean for the traditional telecom model. Carriers have built their businesses on terrestrial networks — towers, fiber and spectrum licenses — that require heavy capital spending to expand coverage. Satellite constellations aim to deliver connectivity from orbit, potentially reaching areas where building ground infrastructure is costly or impractical. If that approach scales, it could pressure the pricing power and subscriber growth assumptions that underpin carrier valuations.

What to watch: how quickly satellite services move from niche coverage to mainstream competition, whether carriers respond through partnerships or their own orbital ventures, and how regulators treat the overlap between telecom and satellite operators.