AT&T is trading 10.07% down at $22.11, mainly on concerns about stronger competition from Starlink Mobile after SpaceX agreed to acquire Grain Management’s nationwide 800 MHz spectrum portfolio. - The deal covers up to 14 MHz of paired spectrum and requires FCC approval. - Reuters and CNBC linked the telecom selloff to satellite-mobile competition and SpaceX’s U.S. telecom push; broader markets are higher. - AT&T closed at $24.87 on October 8 before the decline.