Stocks were mostly lower Thursday morning after the world's most valuable company disappointed on earnings.   Dow (INDEXDJX:.DJI) futures rose 0.05% to 13 726. S&P 500 (INDEXSP:.INX) futures dropped 0.21% to 1 487.20. Nasdaq (INDEXNASDAQ:.IXIC) futures sank 1.26% to 2 724.25. The Nasdaq index was particularly hard hit by Apple's (NASDAQ:AAPL) after-hours fall. Apple unexpectedly booked  higher profits but fell short on margins and outlook. Boosted by 48 million iPhone sales revenue for the company's first fiscal quarter rose 18% from the year earlier to $54.5 billion. Profit fell to $13.1 billion or $13.87 per share. Revenue for the ...