The S&P 500 was up 0.15% to 1,554.85 in afternoon trading Wednesday.
The Dow Jones Industrial Average rose 0.08% to 14,461.96, while the Nasdaq rose 0.14% to 3,246.92.
The yield on a 10-year treasury bond was up 0.59% to 2.04%.
The price of gold was off 0.31% to $1,586.70 per ounce.
Shares of Aliso Viejo-based networking-equipment maker QLogic Corp. continued to rise, up about 2% to $12.06 in midday trading Wednesday. The company is up about 4% so far this week to a market value of $1.1 billion.
Huntington Beach-based Quiksilver Inc. was up about 5% to $6.36 for a market value of $1.06 billion.
The company's shares dipped 2% last week after it reported disappointing first-quarter results. The action sports apparel maker is up 38% so far this year.
Shares of Anaheim-based frozen and refrigerated foods manufacturer and distributor Bridgford Foods Corp. rose about 18% to $8.71 for a market value of $79.76 million.