The S&P 500 was down 0.2% in midday trading to 2,182.38.
The Dow Jones Industrial Average was down 0.1% to 18,881.56.
The NASDAQ was down 0.2% to 5,334.35.
The yield on a 10-year Treasury bond was up 3.2% to 2.34%.
The price of gold was down 0.7% at $1,208.
Newport Beach-based Acacia Research Corp. was up 4.2% to $6.77 and a $342 million market cap. The patent licensing company said two of its subsidiaries have new agreements with HTC Corp.
Irvine-based ChromaDex Corp. was down 5% to $2.48 and a $94 million market cap. The ingredients maker shares are trading at above average volume.