Stocks Open Mixed Ahead of Key Earnings

Stocks are opening mixed as Wall Street weighs another round of corporate earnings reports. Apple's stock is dragging the technology-heavy Nasdaq lower.

Apple CEO Steve Jobs announced Monday he will take a medical leave of absence to focus on his health. The news came on a day when U.S. markets were closed. Apple's stock was down 5.2 percent in early trading Tuesday.

Apple releases its earnings after the market closes. Several other big-name companies, including Citigroup, Delta Air Lines and TD Ameritrade, released results Tuesday morning.

At the opening, the Dow Jones industrial average is up 24, or 0.2 percent, at 11,813. The Standard & Poor's 500 index is up less than a point at 1,293. Nasdaq 100 index futures are down 2, or 0.1 percent, at 2,754.