The S&P 500 fell 0.10% to 1,520 in afternoon trading Friday.

The Dow Jones Industrial Average was down 0.05% to 13,966, while the Nasdaq was off 0.07% 3,197.

The yield on a 10-year treasury bond rose 1.30% to 2.03%.

The price of gold fell 1.74% to $1,607 per ounce.

Shares of Anaheim drug maker Questcor Pharmaceuticals Inc. rose about 4% to $29 for a market value of $1.7 billion. Questcor’s trading volume was about twice its daily average by midday.

Anaheim action sports retailer Pacific Sunwear of California Inc. was up about 5% to $2 for a market value of $156.3 million. D.A. Davidson upgraded the company's stock from "neutral" to "buy.”