Richard Drew, file, Associated Press
FILE - In this file photo taken Jan. 12, 2011, traders work on the floor of the New York Stock Exchange.

NEW YORK — Stocks are headed for a mixed opening as Wall Street weighs another round of corporate earnings reports. Apple's stock is dragging the technology-heavy Nasdaq lower, however.

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 percent in pre-market trading Tuesday.

The technology company is set to report earnings after the market closes.

Several other big-name companies are releasing results Tuesday morning.

Ahead of the opening bell, Dow Jones industrial average futures are up 18, or 0.2 percent, at 11,743. Standard & Poor's 500 futures are flat at 1,290. Nasdaq 100 index futures are down 17, or 0.7 percent, at 2,303.