The S&P 500 was down 0.1% to 2,121.88 in midday trading.
The Dow Jones Industrial Average was down 0.4% to 18,050.94.
The Nasdaq was up 0.5% to 5,190.60.
The yield on a 10-year Treasury bond was flat at 2.35%.
The price of gold was down 1% to $1,131.
Irvine-based Habit Restaurants Inc. was up 8.4% to $30.63 and an $864 million market cap on above-average volume after hitting a post-IPO low of $28.21 yesterday.
Tustin-based Peregrine Pharmaceuticals Inc. was up 3.8% to $1.37 and a $258 million market cap. The cancer drug developer reported higher revenue and a lower loss than Wall Street expected for its 2015 fiscal year and it forecast an increase in 2016 revenue. Analysts at Noble Financial initiated coverage on Peregrine shares with a “buy” rating.