Yellen calls for tighter bank regulations amid concerns of looseness.

US Treasury Secretary Janet Yellen has called for a re-examination of banking regulation and supervisory rules in the wake of the recent failures of Silicon Valley Bank and Signature Bank. Yellen also called for stronger regulation of the growing non-bank, or "shadow bank", sector, including money market funds, hedge funds, and crypto assets. She expressed concerns about the use of leverage by some hedge funds and the potential for systemic risks from digital assets, particularly stablecoins. Yellen also warned of the financial risk of a failure by Congress to raise the debt limit, leading to a default on US obligations.