Apple stock slipped 0.5%, threatening to snap a four-day win streak that saw it regain its 50-day moving average. Salesforce climbed 0.4%, still below its own 50-day line. And UnitedHealth bounced back 0.5% following Wednesday's 5.7% sell-off.

Stock futures are little changed Friday morning as investors await the highly anticipated release of monthly employment data that will factor into the Federal Reserve's decision-making on interest rates.