Investors have been moving into stocks, but where the money has been coming from was unexpected, Charles Schwab Investment Management CEO Marie Chandoha said Thursday on CNBC.

"One of the things that we saw was an uptick in equity flows, and what was interesting was, it was coming from money funds and moving into equity," she said. "So, people weren't rotating from fixed-income to equities, they were taking money out of cash and putting it into equities."