WASHINGTON — Treasury Secretary Janet L. Yellen expressed confidence in the nation’s banks on Tuesday but said she was prepared to take additional action to safeguard smaller financial institutions as the Biden administration and federal regulators worked to contain fallout from fears over the stability of the banking system.Ms. Yellen, seeking to calm nerves as the U.S. financial system faces its worst turmoil in more than a decade, said the steps the administration and federal regulators had taken so far had helped restore confidence. But policymakers were focused on making sure that the broader banking system remained secure, she said.“Our intervention was necessary to protect the broader U.S. banking system,” Ms. Yellen said in remarks before the American Bankers Association, the industry’s leading lobbying group. “And similar actions could be warranted if smaller institutions suffer deposit runs that pose the risk of contagion.”She ad …
