Tesla's Q3 2026 earnings, released after the close on October 21, served as the dominant catalyst for share-price movement during the week of October 19. Revenue held flat at $28.05 billion while non-GAAP EPS of $0.48 beat consensus, supported by improved automotive margins and a swing to $1.53 billion in positive free cash flow after lower-than-expected capex. The company also lowered full-year 2026 capital-spending guidance to roughly $20 billion and highlighted progress in unsupervised robotaxi miles, Cybercab fleet expansion in Austin, and early Optimus production. These results produced an initial post-print rally above $386 before shares reversed lower to close October 22 near $374.58 amid questions over the pace of AI and autonomy investment. Trader positioning on Polymarket reflects this mixed fundamental backdrop, with attention now turning to upcoming regulatory milestones for FSD and any further clarity on potential SpaceX merger discussions.