The S&P 500 was down 0.2% in midday trading to 2,658.77.

The Dow Jones Industrial Average fell 0.1% to 24,568.39.

The Nasdaq declined 0.1% to 6,868.04.

The yield on a 10-year Treasury bond climbed 0.4% to 2.36%.

The price of gold rose 0.7% to $1,257.

HEALTHCARE

Ensign Group Inc. (Nasdaq: ENSG) in Mission Viejo was down 4.3% to $22.18 and a $1.1 billion market cap. The company operates healthcare facilities.

ChromaDex Corp. (Nasdaq: CDXC) in Irvine declined 5.1% to $6.21 and a $334 million market cap. It makes ingredients for nutritional products.

RETAIL

Tilly’s Inc. (NYSE: TLYS) in Irvine dropped 4.4% to $14.76 and a $426 million market cap. Tilly’s runs a chain of youth fashion stores.

SERVICES

ShiftPixy Inc. (Nasdaq: PIXY) in Irvine fell 8% to $2.18 and a $62 million market cap. The company provides short-term and shift workers to the restaurant industry via computer platform and a mobile app.

TECHNOLOGY

Smith Micro Software Inc. (Nasdaq: SMSI) in Aliso Viejo was up 3.9% to $2.94 and a $42 million market cap. The company makes software for mobile and wireless markets.