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Fed, BoE Probe Bank Exposure to Trading Firms After Jane Street Loss, FT Reports

Summary
U.S. and U.K. financial regulators are intensifying their examination of global banks' links to major trading houses like Jane Street and Citadel Securities, following a multi-billion dollar loss at Jane Street, according to a Financial Times report.
The U.S. Federal Reserve and the Bank of England have reportedly stepped up their scrutiny of global banks' financial exposure to large trading firms after Jane Street sustained a significant loss in July. The development was reported by the Financial Times on Monday, citing people familiar with the matter.
The Catalyst for Scrutiny
The increased regulatory focus follows a $15 billion loss at trading giant Jane Street in July, which occurred as a rally in artificial intelligence-related assets reversed. According to the report, the loss was partly due to turmoil at the AI-focused hedge fund Situational Awareness, in which Jane Street was an investor.
Despite the July loss, Jane Street's performance for the year remained strong. The firm had reportedly generated $40 billion in net trading revenues by early August, already surpassing its record from the previous year.
Details of the Regulatory Probe
Regulators are now questioning global banks about their dealings with major trading firms and market makers, including Jane Street and Ken Griffin's Citadel Securities, the report said. The inquiries are seeking specific details on the trading firms' risk appetite, how banks' intraday exposures to these clients evolve, and the effectiveness of their risk controls.
AdThis probe is an acceleration of a pre-existing regulatory priority to better understand the links between banks and non-bank financial intermediaries (NBFIs), a category that includes proprietary trading firms and private credit providers.
Market Context and Implications
Specialist trading firms have grown substantially since the 2008 financial crisis, filling a void as banks curtailed their proprietary trading activities. Banks provide critical market access to these firms through prime brokerage services, which include extending leverage and financing trades. This relationship means banks could face substantial losses if a major trading client were to default.
If regulators determine that banks are taking on excessive risk through these exposures, they have the authority to require them to hold more high-quality liquid assets to bolster their resilience. The Bank of England has also recently examined the rapid growth in financing for Asian equities by London-based prime brokers amid the AI-driven stock rally, the report added.
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