The latest on developments in financial markets (All times local):
Technology and consumer-focused stocks are leading indexes slightly higher in early trading as investors return from a long holiday weekend.
Facebook and Microsoft each rose 0.6 percent in the first few minutes of trading Monday, while Amazon.com gained 1 percent.
Medical device maker Alere rose 16 percent after it agreed to new terms for a sale to Abbott Laboratories.
The Standard & Poor's 500 index gained 6 points, or 0.3 percent, to 2,335.
The Dow Jones industrial average rose 76 points, or 0.4 percent, to 20,526. The Nasdaq composite increased 19 points, or 0.4 percent, to 5,824.