The S&P 500 was down 0.3% in midday trading to 2,376.48.
The Dow Jones Industrial Average was down 0.2% to 20,973.56.
The NASDAQ was down 0.3% to 5,851.55.
The yield on a 10-year Treasury bond rose 0.5% to 2.51%.
The price of gold fell 0.1% to $1,226.
Autobytel Inc. in Irvine was up 3% to $12.89 and a $141 million market cap. The automobile sales leads provider is scheduled to report results Thursday.
Habit Restaurants Inc. in Irvine was down 4% to $14.65 and a $460 million market cap. The fast casual burger chain’s shares had risen 10% Friday after a positively received quarterly report.
Aeolus Pharmaceuticals Inc. in Mission Viejo was up 10% to 20 cents and a $31 million market on very high volume. Aeolus is developing compounds to fight cancer and infectious diseases, among other applications.