The S&P 500 climbed 0.3% in midday trading to 2,390.13.
The Dow Jones Industrial Average was flat at 20,936.04.
The NASDAQ rose 0.7% to 6,091.45.
The yield on a 10-year Treasury bond rose 2.2% to 2.33%.
The price of gold fell 1% to $1,256.
HEALTHCARE
Mission Viejo-based Ensign Group climbed 9.3% to $19.62 and a $1 billion market cap. The company reported first-quarter revenue of $441.7 million, exceeding the average estimate of four analysts of $435.7 million.
SERVICES
Utilities consultant and engineering firm Willdan Group Inc. rose 6.5% to $30.20 and a $259 million market cap. The Anaheim-based company is scheduled to report first-quarter earnings on May 4.
