Treasury Secretary Jack Lew Not Worried About Market Bubbles

Well, that's reassuring

With stocks at all-time highs despite only tepid economic growth, there's little sign of a bubble forming in markets, Treasury Secretary Jack Lew told CNBC on Thursday.

"There's always going to be concern not to get to a point where we have the seeds of a future crisis," Lew said. "The analysis I've seen doesn't give me reason to be worried right now."

Lew said that policymakers still need to see what's going on in firms and markets, and have the regulatory tools to deal with problems when they develop.