U.S. stock index futures slipped Friday, tracking shares in Europe, as concerns lingered over the euro zone debt crisis in what could otherwise be a light trading day ahead of the Memorial Day weekend.
Adding to jitters, Spain's Bankia shares were halted ahead of a board meeting to approve a recapitalization plan.
Investors will be closely watching the latest consumer sentiment report from the Thomson Reuters/University of Michigan, due at 9:55 a.m.ET. Economists expect a reading of 77.8, a repeat of the preliminary May reading, according to a Reuters survey.
Morgan Stanley will adjust thousands of trades to ensure outstanding limit orders to sell will be filled at no more than $42.99 a share for Facebook stock from last Friday's botched initial public offering, the firm told its brokers.