The S&P 500 was up 0.4% in midday trading to 2,723.24.
The Dow Jones Industrial Average rose 0.3% to 24,767.57.
The Nasdaq climbed to 0.6% to 7,397.84.
The yield on a 10-year Treasury bond ticked up 0.2% to 3.09%.
The price of gold was 0.1% higher at $1,292.
Boot Barn Holdings Inc. (NYSE: BOOT) in Irvine was up 13% to $24.81 and a $673 million market cap. The Western wear retailer beat expectations on earnings.
PharmaCyte Biotech Inc. (OTC: PMCB) in Laguna Hills was up 9% to 56 cents and a $56 million market cap. It develops cellular therapies to treat cancer and diabetes and today reported the completion of a series of tests of company technology for use against pancreatic cancer.