The S&P 500 was up 0.3% in midday trading to 2,713.42.
The Dow Jones Industrial Average was flat at 24,784.41.
The Nasdaq climbed 0.3% to 7,303.65.
The yield on a 10-year Treasury bond leapt 1.5% to 2.86%.
The price of gold ticked 0.3% higher to $1,353.
Boot Barn Holdings Inc. (NYSE: BOOT) in Irvine was up 4.4% to $18.30 and a $496 million market cap. It runs a chain of Western-wear stores.
Endologix Inc. (Nasdaq: ELGX) in Irvine was up 5.4% to $4.44 and a $371 million market cap. It makes a medical device to treat abdominal aortic aneurysms.
ChromaDex Corp. (Nasdaq: CDXC) in Irvine was up 4% to $4.21 and a $231 million market cap. It makes nutrition ingredients and products.