Art Cashin: U.S. Stocks Bottoming? Not Yet

The U.S. market might be down nearly 4 percent Thursday, but Art Cashin thinks stocks may not have hit bottom yet.

"We may wind up retesting the bottom," said the director of floor operations for UBS Financial Services.

"You never bet on the end of the world. That only happens once and the odds of something happening once an eternity are pretty long," he said. "But I think you want to be careful. I think we’re seeing selling across broad asset classes here."