Yellen referenced the “swift response” to help those banks with federal funds. She said, though, that the efforts “were not focused on aiding specific banks or classes of banks.”

“Our intervention was necessary to protect the broader U.S. banking system,” she said.

Yellen raised eyebrows with her next statement.

“And similar actions could be warranted if smaller institutions suffer deposit runs that pose the risk of contagion,” Yellen said, reportedly signaling that similar action for other banks could be coming.

[I’m not sure if that’s a warning, or just reassurance if more instability arises. Either way, it’s not exactly comforting. — Ed]