The S&P 500 was down 0.2% in midday trading to 2,176.35.

The Dow Jones Industrial Average was down 0.2% to 18,504.46.

The NASDAQ was down 0.4% to 5,207.29.

The yield on a 10-year Treasury bond was down 2.5% to 1.51%.

The price of gold was up 0.5% to $1,353.

TECHNOLOGY

Irvine-based Western Digital Corp. was down 3.6% to $43.65 and a $12.3 billion market cap on moderate volume. The company makes memory storage products.

Newport Beach-based Clean Energy Fuels Corp. was up 19% to $3.45 and a $412 million market cap. The nation’s largest operator and owner of natural gas fueling stations earned $1.5 million on $108 million in revenue in its most recent quarter, compared with a loss of $87 million on $30 million in revenue in the same period last year.

Rancho Santa Margarita-based Liquid Metal Technologies Inc. was down 20% to 13 cents and a $76 million market cap. The company lost about $2.3 million on revenue of $34,000 in its most recent quarter. The development-stage maker of amorphous alloys is in the process of being sold to Hong Kong-based Liquidmetal Technology Ltd. for $63.4 million.