The S&P 500 fell 0.34% to 1,563.85 in midday trading Monday.
The Dow Jones Industrial Average was down 0.02% to 14,575.16, while the Nasdaq was off 0.65% to 3,246.34.
The yield on a 10-year treasury bond fell 0.65% to 1.84%.
The price of gold rose 0.32% to $1,600.30 per ounce.
Shares of Irvine-based homebuilder Standard Pacific Corp. were down about 3% to $8.38 for a market value of $2.9 billion. Homebuilders were generally down on Monday.
Anaheim drug maker Questcor Pharmaceuticals Inc. was off about 2% to $31.83 for a market value of $1.83 billion. Questcor is up about 23% so far this year.