The Dow Jones industrial average rose 15 points to end at 13,170 Monday. The index traded within a narrow range of just 56 points.
The Standard and Poor's 500 was up less than a point at 1,419. The Nasdaq composite rose nine points to 2,987.
McDonald's rose 93 cents to $89.41. The company's sales rose in November as U.S. customers bought more breakfast offerings and limited-time Cheddar Bacon Onion sandwiches.
Italian Prime Minister Mario Monti announced he will step down after losing support from a key political party.
Rising stocks narrowly outnumbered falling ones on the New York Stock Exchange. Volume was lighter than average at 2.9 billion shares.