The S&P 500 was down 1% in midday trading to 2,149.54.
The Dow Jones Industrial Average was down 0.8% to 18,257.99.
The NASDAQ was down 1.3% to 5,117.20.
The yield on a 10-year Treasury bond was up 1.8% to 1.52%.
The price of gold was up 1% to $1,373.
HEALTHCARE
Mission Viejo-based Ensign Group Inc. was down 11.5% to $19.02 and a $990 million market cap. The healthcare facilities operator reported net income of $11.4 million for its most recent quarter, down 14% from $13.2 million in the same period last year.
RESTAURANTS
Costa Mesa-based El Pollo Loco Holdings Inc. was down 7.3% to $12.31 and a $472 million market cap on above-average volume. The fast food chicken chain is scheduled to report results Thursday.
