The S&P 500 was down 0.3% in midday trading to 2,423.77.
The Dow Jones Industrial Average was down 0.3% to 21,202.87.
The NASDAQ was down 0.8% to 6,157.53.
The yield on a 10-year Treasury bond was flat at 2.20%.
The price of gold was down 0.3% to $1,268.
BJ’s Restaurants Inc. was down 5.4% to $41.10 and an $886 million market cap on above-average volume. The casual dining chain’s shares had traded by midday at about a 50% higher rate than its 90-day average.
Willdan Group Inc. in Anaheim was down 5.2% to $31.59 and a $267 million market cap on moderate volume. The engineering company’s shares have tripled over the last 12 months.