The Nasdaq was down 0.02% to 3,149 in midday trading Friday, while the Dow Jones Industrial Average was up 0.34% to 13,621.
The S&P 500 rose 0.22% to 1,465.
The yield on a 10-year treasury bond was up 3.6% to 1.73%.
The price of gold fell 0.82% to $1,782 per ounce.
Shares of Anaheim-based drug maker Questcor Pharmaceuticals were down about 5% to $18 for a market value of $1 billion.