The S&P 500 was down 0.09% to 1,501 in midday trading Thursday.
The Dow Jones Industrial Average was off 0.13% to 13,893, while the Nasdaq was up 0.14% to 3,147.
The yield on a 10-year treasury bond fell 0.90% to 1.99%.
The price of gold was down 1.18% to $1,662 per ounce.
Irvine-based real estate data and service provider CoreLogic Inc. was up about 5% to $26 for a market value of $2.5 billion. CoreLogic said it expects its fourth-quarter and full-year results to come in at the higher end of previously issued guidance. The company also said it expects full-year 2013 revenue and profit growth.
Newport Beach-based patent licensing company Acacia Research Corp. was up about 3% to $26 for a market value of $1.3 billion. Acacia announced Thursday its purchase of vascular device technology patents, part of the company's ongoing focus on increasing its patent portfolio holdings in the medical device and diagnostics industries.