The S&P 500 was down 0.5% in midday trading to 2,566.91.
The Dow Jones Industrial Average fell 0.6% to 23,280.17.
The NASDAQ declined 0.4% to 6,710.28.
The yield on a 10-year Treasury bond fell 1.7% to 2.34%.
The price of gold dropped 0.4% to $1,278.
Boot Barn Holdings Inc. (NYSE: BOOT) in Irvine was up 6.7% to $12.46 and a $333 million market cap. JP Morgan upgraded the western wear retailer’s shares to “overweight” from “neutral” and raised its price target to $17 from $9.
Glaukos Corp. (NYSE: GKOS) in San Clemente declined 5.7% to $27.01 and a $933 million market cap on above average volume. The company develops devices to treat glaucoma.