European auto stocks just caught a tailwind. Trump's latest move rolling back strict fuel economy standards sparked a rally across legacy carmakers—shares jumped as regulatory pressure eased. The shift signals a potential slowdown in the forced EV transition timeline, giving traditional manufacturers breathing room. Markets reacted swiftly, with investors betting on extended profitability windows for combustion-engine production. Policy pivots like this ripple beyond equities, hinting at broader energy and industrial realignments that could reshape supply chains and capital flows.