The S&P 500 was down 0.2% in midday trading to 2,167.13.

The Dow Jones Industrial Average was down 0.3% to 18,388.32.

The NASDAQ was down 0.1% to 5,205.26.

The yield on a 10-year Treasury bond was up 1.5% to 1.60%.

The price of gold was flat at $1,325.

RETAIL

Irvine-based Tilly’s Inc. is up 4% to $7.79 and a $224 million market cap on above average volume. The youth apparel retailer reported positive quarterly results Wednesday after markets closed.

HEALTHCARE

Irvine-based Biolase Inc. was up 9% to $1.55 and a $91 million market cap on high volume. The dental laser maker had by midday traded shares at a rate double its 90-day average. Biolase shares are up by about 40% this month, since the company reported a narrower quarterly loss.