The S&P 500 fell 0.66% to 1,541.90 in afternoon trading Tuesday.
The Dow Jones Industrial Average was down 0.35% to 14,401.41, while the Nasdaq was off 0.67% to 3,215.95.
The yield on a 10-year treasury bond fell 2.56% to 1.91%.
The price of gold rose 0.64% to $1,614.90 per ounce.
Shares of Irvine-based disk drive maker Western Digital Corp. were off about 2% to $48.50 for a market value of $11.74 billion. Competitor Seagate Technology LLC of Cupertino was also down about 3% to a market value of $12.32 billion.
Irvine heart valve maker Edwards Lifesciences Corp. was down about 3% to $78.81 for a market value of $9.03 billion. Edwards is down about 12% so far this year.
Shares of Santa Ana-based CoreLogic Inc. fell about 3% to $25.65 for a market value of $2.52 billion.