Better late than never...
Nearly two months after Leopold Aschenbrenner's Situational Awareness went from a $45 billion AI juggernaut to a Citadel block trade after it dumped its entire public book on Ken Griffen's doorstep at a 10% discount and six weeks after we learned that Jane Street lost $15 billion in July, its first down month in a decade, central bankers on both sides of the Atlantic have noticed that something may have happened.
According to the FT, the Bank of England's Prudential Regulation Authority and the Federal Reserve have "stepped up scrutiny" of banks' exposure to large trading firms and market makers. They are asking global lenders how much they have lent to Jane Street and Ken Griffin's Citadel Securities, and presumably also to such HFT money makers as Susquehanna and Hudson River Trading.
Regulators want to know three things: the firms' risk appetite, how banks' exposure to them "evolved during the day," and how risk controls held up. That's a polite way of asking whether anyone at the prime brokers was actually watching intraday margin as the AI trade fell apart in July.
While the PRA, the Fed and Jane Street all declined to comment, Jane's silence is the least surprising. Its last public word on the subject came from partner Turner Batty, who told investors, in
