U.S. stocks moved slightly higher early Tuesday as the markets awaited quarterly results from Apple (AAPL) - Get Report , which are due after the markets close. Apple is expected to report earnings of $1.65 a share, compared to $1.96 during the same quarter a year ago. Revenue of $46.9 billion is expected; down from $51.5 billion a year ago. Analysts are still bullish on Apple's stock. Under Armour (UA) - Get Report shares sunk by roughly 15% after the company said its gross margin dropped to 47.5% in third quarter, compared to 48.8% in the same quarter in 2015. For its third quarter, the company topped Wall Street's estimates on both the top and bottom lines. Procter & Gamble (PG) - Get Report reported earnings of $1.03 a share for its most recent quarter, eclipsing forecasts of $0.98. Revenue was unchanged year-over-year and met analysts' expectations. China sales grew 2% and the company said UK sales were "challenging" amid its pending exit from the European Union. TheStreet's Scott Gamm reports from Wall Street.