S&P 500 futures fell 5.8 points while Nasdaq 100 futures lost 21.75 points.
Apple shares lost 4.8 percent to $402 in extended trading.
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In the regular session, U.S. stocks surged as buyers latched on to another report of agreements to strengthen the euro zone's rescue fund and bid up stocks aggressively.
(Reporting by Ryan Vlastelica; Editing by Jan Paschal)