The S&P 500 rose 0.01% to 1,883.90 in afternoon trading Friday.
The Dow Jones Industrial Average was off 0.12% to 16,538.26, while the Nasdaq was up 0.10% to 4,131.72.
The yield on a 10-year Treasury bond fell 0.42% to 2.60%.
The price of gold rose 1.18% to $1,298.60 per ounce.
Santa Ana-based Universal Electronics Inc. rose about 10% to $40.52 for a market value of $643.82 million. The company beat consensus estimates on first-quarter earnings, which it reported after market close Thursday.
Also Viejo-based networking equipment maker QLogic Corp. slipped about 6% to $10.10 for a market value of $878.26 million. The company swung to a loss in the March quarter compared to a year earlier and reported revenue down.
Newport Beach-based specialty chemicals maker American Vanguard Corp. slumped about 15% to $14.90 for a market value of $428.70 million. The company reported revenue down 33% to $81.1 million and net income off about 87% to $2.2 million
Huntington Beach-based BJ's Restaurants Inc. was up about 4% to $30.70 for a market value of $870.60 million. The restaurant operator reported better-than-expected results for its April quarter and a business that improved in the back half of the quarter.
Irvine-based Autobytel Inc. was down about 10% to $12.12 for a market value of $107.98 million.
The company's stock closed up about 7% on Thursday in a run-up to its earnings results released after market close.