After a 12-day rally in stocks, investors should stay in the market, Stephen Weiss of Short Hills Capital said Thursday.
"I think you continue to buy," he said, adding that "there are a lot of people that are still underinvested in the market."
Weiss said that at a recent two-day hedge fund conference, many newer money managers were cautious, while more experienced pros were seeing "a very up market."
On CNBC's "Fast Money," Weiss said that all signs were "go."
"So, I think you've got to get in. and I think the market looks extremely well," he said. "It's clear sailing now through the end of the year. I'm remaining very, very bullish."
Joe Terranova of Virtus Investment Partners said that he didn't chase stocks as they ran up following the Fed's announcement of unabated stimulus and one overbought exchange-traded fund was the iShares MSCI Emerging Markets ETF.