Tesla's planned Terafab Texas semiconductor complex with SpaceX is drawing investor attention for its potential to reshape the company's AI ambitions and long-term margin story. The facility ties directly to Tesla's push into real-world AI and autonomous systems, and could help the company control chip supply for its Full Self-Driving and Optimus robot. For investors, Terafab sits at the intersection of the bull case on AI and the concern that rising capital spending may keep margins under strain. The project comes amid broader questions about Tesla's global manufacturing footprint, following a Wall Street Journal report in late July 2026 that Tesla was exploring options to separate its China business ahead of a potential SpaceX merger, a story both Elon Musk and Tesla representatives publicly rejected as false.