Wall Street strategy chief says stocks at current levels are 'vulnerable' to a 6% sell-off

· *John Stoltzfus, chief investment strategist at Oppenheimer Asset Management, said in a note on Monday that stocks at current levels are vulnerable to a pullback of 4% to 6%. *
· *This could enable nervous investors to take profits without FOMO, the strategist said. *
· *He added: "We are reminded that stocks tend not to...