Macy's, Kohl's, JC Penney are expected to report results this week, with Wal-Mart, Target due next week.
The S&P hasn't had a move of more than 0.5 percent since July and has fallen more than 1 percent only twice this year.
The energy sector led the laggards with a 0.9 percent drop as oil prices edged lower on a rebound in production from Libya's largest oil field, along with worries about higher output from OPEC and the United States. It is ending the session up 4.08 points or 0.16% to 2480.91.
Investors continued to concentrate on corporate earnings Monday.
Aviation electronics company Rockwell Collins climbed 5.4 percent after Reuters reported that rival United Technologies made an offer to buy it.
According to data from FactSet last week, earnings in the second quarter grew 10.1 per cent for the S&P 500, higher than the estimated earnings growth rate of 6.4 per cent.