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Stocks won't fall as long as central banks prop them up: NYSE trader

Stocks posting some gains Tuesday afternoon, with big tech names, like the FAANG stocks (plus Microsoft), in the green after that nasty 2-day selloff. Is tech in the clear, or do you expect more downside?

Alan Valdes, director of floor operations for Silverbear, joins Alexis Christoforous from the floor of the New York Stock Exchange to discuss.