The S&P 500 fell 0.04% to 1,840.11 in afternoon trading Wednesday.
The Dow Jones Industrial Average rose 0.05% to 16,138.87, while the Nasdaq fell 0.28% to 4,260.68.
The yield on a 10-year Treasury bond fell was down 0.15% to 2.71%.
The price of gold was down 0.41% to $1,319.20 per ounce.
Irvine-based medical device maker Masimo Corp. was off about 3% to $27.25 for a market value of $1.54 billion. The company last week reported fourth-quarter results that were in line with consensus profit estimates, but missed on revenue.
Huntington Beach-based BJ's Restaurants Inc. was up about 2% to $29.49 for a market value of $832.41 million. The company is expected to report its fourth-quarter results after market close Wednesday.