The S&P 500 was off 0.04% to 1,796.24 in afternoon trading Monday.
The Dow Jones Industrial Average slipped 0.15% to 15,770.60, while the Nasdaq rose 0.29% to 4,137.75.
The yield on a 10-year Treasury bond was up 0.19% to 2.68%.
The price of gold rose 0.94% to $1,274.80 per ounce.
Irvine-based drug maker Allergan Inc. was up about 3% to $122.23 for a market value of $36.28 billion. The company reported better-than-expected fourth-quarter results last week.
Santa Ana-based technology products distributor Ingram Micro Inc. rose about 2% to $24.74 for a market value of $3.81 billion. Brean Capital raised its rating on the company's stock from "hold" to "buy." Ingram is expected to report results for its December quarter on Thursday.