The S&P 500 was flat in midday trading at 2,342.98.

The Dow Jones Industrial Average was down 0.4% to 20,450.15.

The NASDAQ was up 0.4% to 5,875.22.

The yield on a 10-year Treasury bond was up 1.6% to 2.21%.

The price of gold fell 0.9% to $1,283.

FINANCE

Impac Mortgage Holdings Inc. in Irvine was up 8% to $13.75 and a $221 million market cap. The lender sold $56 million in common stock—4.4 million shares at $12.66 a share—directly to some buyers, which included current beneficial shareholders.

HEALTHCARE

Peregrine Pharmaceuticals Inc. in Tustin was up 3.3% to 56 cents and a $167 million market cap. Chicago investor Ronin Capital LLC reported it bought 95,000 preferred shares for $2 million—good for a 5.8% stake in the development-stage cancer drug company.

TECHNOLOGY

Netlist Inc. in Irvine was up 11% to $1.30 and an $80 million market cap in a second day of share price increases, which follows a stockholder rights agreement with an initial purchase price of $6.56 per right in connection with patent infringement proceedings against SK Hynix Inc. Shares in the data storage products maker are up about 27% this week.