Stock indices were lower in midday trading on companies’ mixed quarterly results and a fall in commodities prices.

The S&P 500 was down 0.9% to 2,083.49.

The Dow Jones Industrial Average was down 0.8% to 17,586.77.

The Nasdaq was down 0.9% to 5,102.84

The yield on a 10-year Treasury bond was down 0.9% to 2.26%.

The price of gold was down 0.6% to $1,087.

RESTAURANTS

Lake Forest-based Del Taco Restaurants Inc. was up 1.6% to $16.1 and a $625 million market cap. The fast food chain reports quarterly results Monday.