The Nasdaq was up 0.07% to 2,864.97 in midday trading, while the Dow Jones Industrial Average rose 0.81% to 12,719.91.
The S&P 500 was up 0.25% to 1,341.71.
The yield on a 10-year treasury bond rose 1.07% to 1.42%.
The price of gold was up 2.02% to $1,608 per ounce.
Orange County public companies were generally up in midday trading today.
Shares of Irvine-based chipmaker Broadcom Corp. rose 8.46% to $33.37 to a market value of about $18.5 billion.
Aliso Viejo-based chipmaker Microsemi Corp. was up 6.4% to $17.77. Microsemi has a market value of about $1.6 billion.
Irvine-based device maker Edwards Lifesciences Corp. gained nearly 6% to $104.56, with a market value of about $12 billion.
Shares of Anaheim-based drug maker Questcor Pharmaceuticals Inc. tumbled 16.85% to $37.03 to a market value of about $2.5 billion after missing sales expectations for its flagship drug Acthar.