Indexes up on strong earnings, rising oil prices

Wall Street edged higher on Tuesday morning, driven by strong earnings reports and recovering oil prices, ahead of the Federal Reserve's policy meeting and Apple's results. Crude prices steadied above $30 a barrel on hopes that OPEC and non-OPEC producers would come together to tackle a massive supply glut. Investors are still reeling from a turbulent start to the year, which saw Wall Street post its worst-ever start to a new year.