The S&P 500 was up 0.18% to 1,465 in midday trading Thursday.
The Dow Jones Industrial Average rose 0.10% to 13,427, while the Nasdaq rose 0.14% to 3,117.
The yield on a 10-year treasury bond was up 0.98% to 1.86%.
The price of gold fell 0.79% to $1,676 per ounce.
Shares of Irvine-based Masimo Corp. were down about 6% to $20 after Wall Street Strategies initiated coverage of the medical device maker with a “sell” rating. Masimo had a recent market value of $1.2 billion.
Seal Beach-based Clean Energy Fuels Corp. continued its rise from yesterday, up about 6% to $14 for a market value of $1.2 billion.
Anaheim drug maker Questcor Pharmaceuticals Inc. rose about 3% to $27, a day after the company announced its purchase of contract manufacturer BioVectra Inc. Questcor had a recent market value of $1.6 billion.
Shares of Huntington Beach-based Quiksilver Inc. were up about 5% to $5 on the company’s announcement Thursday morning of the appointment of Andy Mooney, former chairman of consumer products for Burbank-based Walt Disney Co., to chief executive. Mooney will succeed current Chief Executive and Quiksilver co-founder Bob McKnight. The executive changes go into effect Jan. 11. Quiksilver had a recent market value of $763 million.