Stocks Mixed as FedEx Jumps, Nike and Lululemon Slump on Outlooks

• US stocks mixed on Friday; Nasdaq flips into positive territory while Dow slips and S&P flat • FedEx shares jump 7% on higher profits and margins • Nike shares fall over 7% on disappointing sales outlook • Reddit slides 4% in trading debut after surging 48% on first day • Lululemon CEO cites "shift in US consumer behavior", shares plummet 13% on light guidance