Fed and BoE are now asking banks about their exposure to big trading desks after Leopold Aschenbrenner's AI hedge fund almost blew up and cost Jane Street $15B.

SEC already hit Goldman, JPM, Citi and BofA with subpoenas last month. Now central banks want to see if risk controls actually worked when things got messy.

When AI-driven funds start moving serious size and nearly collapse, regulators wake up fast. This isn't just about one fund — it's about how much leverage is floating around and who's on the hook when things unwind.