The day ahead: Tuesday


Earnings season is in full swing with results expected from Caterpillar, Yahoo, Pfizer and Coca-Cola.

*  In its first quarterly earnings report since announcing the Microsoft search deal, Yahoo will provide important updates about its core display advertising business.

*  Heavyweight manufacturers United Technologies and Caterpillar report quarterly results.

*  Coca-Cola will shed light on the state of worldwide consumer spending when the world’s top soft-drink maker reports third-quarter results.