There's plenty of cash yet to move into equities, making the stock market's prospects bright for 2014, Suni Harford of Citigroup said Thursday.

"We still have $9 trillion in household cash. I think a lot of it needs to be put to work," she said. "We've got a lot of our funds, are still sitting on cash. Eight, 9 percent of funds are telling us that they've got cash on the books. So, I think there's more of a technical play on equities. People haven't gotten in yet, especially ahead of January, which is going to be a very telling month."