The S&P 500 was about flat at 2,072.08 in midday trading.
The Dow Jones Industrial Average was down 0.7% to 17,852.25, and the Nasdaq was down 0.05% to 4,927.04.
The yield on a 10-year Treasury bond was off nearly 1.8% to 2.06%.
The price of gold was down 0.5% to $1,147.20.
Newport Beach-based Alliance Healthcare Services Inc., a provider of radiation therapy services and outpatient diagnostic imaging, was down 7% to $23.40 and a $246 million market cap on a mixed fourth-quarter earnings report released after-hours yesterday.
BJ’s Restaurants Inc. was up 1.8% to $53.22 and a $1.4 billion market cap. Wedbush today upgraded the Huntington Beach-based company to “outperform.”