The S&P 500 was down 0.5% in midday trading to 2,069.00.

The Dow Jones Industrial Average was down 0.5% to 17,640.34.

The NASDAQ was down 0.4% to 4,829.16.

The yield on a 10-year Treasury bond was down 0.8% to 1.60%.

The price of gold was up 0.2% to $1,290.

HEALTHCARE

Irvine-based Lombard Medical Inc. was up 7.1% to $1.35 and a $27 million market cap. The maker of endovascular stent-grafts for repairing aortic aneurysms reported “positive” clinic results in a five-year study.

MANUFACTURING

Santa Ana-based QuantumSphere Inc. was down 31% to 38 cents and a $9 million market cap. The maker of chemical catalysts issued promissory notes valued at about $1.3 million and warrants for about 2 million shares to certain accredited investors. The borrowing was secured by two senior executives’ common shares, options, and warrants representing about 3.6 million shares of the company’s common stock.