The S&P 500 was down 0.1% in midday trading to 2,432.93.
The Dow Jones Industrial Average declined 0.2% to 21,249.46.
The NASDAQ fell 0.1% to 6,289.10.
The yield on a 10-year Treasury bond fell 1.9% to 2.14%.
The price of gold rose 1.1% to $1,296.
Newport Beach-based Acacia Research Corp. rose 5.8% to $4.13 and a $209 million market cap. The patent licensing company entered into a license agreement with Medtronic Inc. to resolve pending litigation.
CryoPort Inc. of Irvine rose 5.6% to $3.77 and a $90 million market cap. Shares of the life sciences shipping and packaging firm have almost doubled in the last two months.