The S&P 500 was up 0.09% to 1,799.77 in afternoon trading Monday.
The Dow Jones Industrial Average rose 0.33% to 16,014.71, while the Nasdaq fell 0.06% to 3,983.59.
The yield on a 10-year Treasury bond slipped 1.33% to 2.67%.
The price of gold was off 1.17% to
Avanir Pharmaceuticals Inc. in Aliso Viejo was down about 5% to $4.37 for a market value of $635.68 million. The company was trading on unusually low volume, about one third of its daily average.
Newport Beach-based patent licensor Acacia Research Corp. was up about 3% to $15.60 for a market value of $778.85 million. The company closed up about 4% on Friday after it announced a $70 million stock buyback plan.