The Nasdaq was down 0.52% to 1,942.58 in midday trading, while the Dow Jones Industrial average fell 0.14% to 13,057.95.

The S&P 500 was off 0.24% to 1,382.64.

The yield on a 10-year treasury bond was down 2.51% to 1.52%.

The price of gold fell 0.04% to $1,622 per ounce.

Shares of Aliso Viejo-based networking-equipment maker QLogic Corp. were up 4.57% to $11.67 to a market value of about $1.1 billion. The company’s shares fell last week more than 18% after downgrades from two investment banks following a June quarter profit that came in below analyst expectations.

Elsewhere in the County, Newport Beach-based Alliance Healthcare Services Inc.’s shares rose 14.86% to $0.85. Alliance, with a recent market value of about $41 million, provides scanning services for doctors and hospitals.

Irvine-based Quantum Fuel Systems Technologies Worldwide Inc., which works in the alternative and renewable energy space, was also up about 12.95% to $0.87 to a recent market value of about $40 million.