U.S. stock index futures mixed; all eyes on Apple
January 18, 2011 at 04:12 AM EST
* U.S. stock index futures pointed to a mixed open on Wall Street on Tuesday, with futures for the S&P 500 down 0.02 percent, Dow Jones futures up 0.11 percent and Nasdaq 100 futures down 0.7 percent at 0845 GMT.