The S&P 500 was up 0.5% in midday trading to 2,469.10.
The Dow Jones Industrial Average was up 0.2% to 21,930.51.
The NASDAQ was up 0.8% to 6,419.35.
The yield on a 10-year Treasury bond fell 0.3% to 2.14%.
The price of gold was up 0.7% to $1,323.
Ensign Group Inc. (NASDAQ: ENSG) in Mission Viejo was up 3.4% to a $1 billion market cap. The Zacks investment website released a generally positive update on the health facility owner.
Presbia PLC (NASDAQ: LENS) in Irvine was up 9% to $2.91 and a $50 million market cap on moderate volume. The Dublin, Ireland-chartered device maker sells optical lens implants.
Iteris Inc. (NASDAQ: ITI) in Santa Ana was up 3.3% to $6.33 and a $206 million market cap. The company, which makes sensors and other products for traffic management, agriculture, and weather analysis, expanded applications for one of its main agriculture products.
Consumer Portfolio Services Inc. (NASDAQ: CPSS) in Irvine was up 4.8% to $3.94 and a $90 million market cap on average volume. The company buys and services car loans.