The S&P 500 was up 0.2% in midday trading to 2,131.52.
The Dow Jones Industrial Average was up 0.1% to 18,092.40.
The NASDAQ was up 0.6% to 5,185.64.
The yield on a 10-year Treasury bond was down 2.5% to 1.69%.
The price of gold was up 0.2% to $1,326.
Costa Mesa-based El Pollo Loco was down 3% to $12.84 and a $493 million market cap on moderate volume. Shares in the fast food chicken chain have fallen about 15% since Friday.
Irvine-based Tilly’s Inc. was up 4% to $10.05 and a $286 million market cap on high volume. Shares in the youth apparel retailer are up about 11% for the week.