The S&P 500 fell 0.49% to 1,455 in midday trading Tuesday.
The Dow Jones Industrial Average was off 0.56% to 13,310, while the Nasdaq was down 0.42% to 3,086.
The yield on a 10-year treasury bond fell 1.58% to 1.87%.
The price of gold was up 0.86% to $1,660 per ounce.
Newport Beach-based patent licensing company Acacia Research Corp. was down about 4% to $25 for a market value of $1.3 billion.
Irvine-based disk drive maker Western Digital Corp. fell about 3% to $42 for a market value of $10.2 billion.