The S&P 500 was up 0.4% in midday trading to 2,089.64.

The Dow Jones Industrial Average was up 0.5% to 17,820.98.

The Nasdaq was up 0.6% to 5,102.56.

The yield on a 10-year Treasury bond was up 0.4% to 2.26%.

The price of gold was flat at $1,077.

RETAIL

Orange County-based retailers were up on sector strength stemming from earnings reports.

Irvine-based Boot Barn Holdings Inc. was up 4% to $10.67 and a $269 million market cap. Irvine-based Tilly’s Inc. was up 6% to $6.19 and a $176 million market cap. Anaheim-based Pacific Sunwear of California Inc. was up 5% to 29 cents and a $20 million market cap.

RESTAURANTS

Irvine-based Habit Restaurants Inc. was up 9.2% to $23.76 and a $618 million market cap. The fast casual burger chain postponed its secondary offering of shares that had been expected to begin yesterday.

TECHNOLOGY

Irvine-based Multi-Fineline Electronix Inc. was up 5.2% to $23.11 and a $563 million market cap on above-average trading volume for the printed circuit board maker.

HEALTHCARE

Alliance Healthcare Services Inc. was up 14.2% to $8.87 and a $94 million market cap on moderate volume. Shares in the oncology and radiology clinic operator had fallen about 50% in recent weeks.