Four sets of options expire during Friday's trading session—an event known as "quadruple witching"—and that has veteran trader Art Cashin warning of a negative bias for all of next week.
"The bulls have a bit of an uphill fight to go here," Cashin told CNBC on Thursday. "The volume itself is very light here. They're not dumping things. It's more of a buyers' boycott—I guess an exhaustion pullback so far."