WASHINGTON—Treasury Secretary Janet Yellen plans to say that regulators might need to tighten banking rules after the collapse of Silicon Valley Bank and Signature Bank, arguing that the recent turmoil is a sign that efforts to bolster the financial system are incomplete.
In remarks prepared for later Thursday, Ms. Yellen questioned whether the regulatory system she helped build after the 2008 financial crisis was adequate to protect financial stability. Regulators this month extended emergency assistance to banks and stepped in to protect all depositors at SVB and Signature.
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