The S&P 500 was up 0.2% in midday trading to 2,095.02.

The Dow Jones Industrial Average was up 0.1% to 17,838.80.

The NASDAQ was up 0.4% to 4,922.80.

The yield on a 10-year Treasury bond was up 0.8% to 1.84%.

The price of gold was down 0.7% to $1,214.

RETAIL

Irvine-based Tilly’s Inc. was up 4.6% to $6.44 and a $183 million market cap. The apparel seller’s shares are up about 13% over the last two days.

HEALTHCARE

Irvine-based Endologix Inc. was up 2.3% to $13.02 and a $1.1 billion market cap on moderate volume. The device maker’s shares are up about 10% on the week.

Irvine-based NuGene International Inc. was up 4.4% to 57 cents and a $23 million market cap. The skin-care products maker had by midday traded shares at a rate about double its 90-day average.

Costa Mesa-based Nemus Bioscience Inc. was down 18% to 37 cents and a $7.4 million market cap on above-average volume. The company is developing cannabis-based drug therapies.