The S&P 500 rose 0.03% to 1,805.34 in afternoon trading Monday.
The Dow Jones Industrial Average was up 0.15% to 16,088.78, while the Nasdaq was up 0.17% to 3,998.61.
The yield on a 10-year Treasury bond slipped 0.40% to 2.74%.
The price of gold fell 0.28% to $1,240.60 per ounce.
Anaheim-based drugmaker Questcor Pharmaceuticals Inc. was off about 5% to $56.18 for a market value of $3.31 billion. Questcor's stock has risen about 128% since the start of this year.
Huntington Beach-based action-sports apparel maker and retailer Quiksilver Inc. was down about 4% to $8.34 for a market value of $1.4 billion. The company is still up 96% since the start of the year.