The S&P 500 was up 0.2% in midday trading to 2,584.76.

The Dow Jones Industrial Average rose 0.1% to 23,543.43.

The NASDAQ jumped 0.4% to 6,743.42.

The yield on a 10-year Treasury bond was flat at 2.35%.

The price of gold fell 0.8% to $1,269.

RESTAURANTS

El Pollo Loco Holdings Inc. (Nasdaq: LOCO) in Costs Mesa was down 12% to $9.88 and a $381 million market cap. The fast food chicken chain reported a net loss of $4 million on revenue of $101 million for its most recent quarter, compared with net income of $5 million on revenue of $96 million, year-over-year.

TECHNOLOGY

Clean Energy Fuels Corp. (Nasdaq: CLNE) in Newport Beach was down 15% to $2.04 and a $308 million market cap. The natural gas station operator lost $74.1 million on revenue of $81.8 million in its most recent quarter. Both numbers missed analyst estimates; $73.8 million of the loss came from a charge-off related in part to closing 42 under-performing fuel stations.

RETAIL

Boot Barn Holdings Inc. (NYSE: BOOT) in Irvine was up 18% to $9.95 and a $264 million market cap. The western wear chain reported higher sales and net income, topping analyst expectations for each. Boot barn said same-store sales increased as well.

SERVICES

Willdan Group Inc. (Nasdaq: WLDN) in Anaheim was down 15% to $25.62 and a $223 million market cap. Willdan reported higher revenue and income for its most recent quarter but costs at the engineering firm rose as well, cash-on-hand declined, and income was adversely affected by expired tax breaks. Willdan guided full-year revenue slightly higher but the top end of its earnings per share lower.

AutoWeb Inc. (Nasdaq: AUTO) in Irvine was up 6% to $7.18 and a $93 million market cap. The car sales lead provider reported lower revenue and earnings but said some declines were expected as AutoWeb moved more into new lead-generation methods; it said those developing areas—mainly click-based ads—saw upticks in the quarter.