The S&P 500 fell 0.1% to 2,010.03 in midday trading.
The Dow Jones Industrial Average rose 0.1% to 17,284.70 and the Nasdaq fell 0.4% to 4,575.10.
The yield on a 10-year Treasury bond fell 1.6% to 2.59%
The price of gold was down 0.3% to $1,226.50.
OC homebuilders fell on declining housing starts in August. Single-family home starts fell 2.4% and multifamily building plunged 32%, according to the U.S. Department of Commerce.
Newport Beach-based William Lyon Homes was down 2.1% to $24.36 and a market cap of $760.7 million. Irvine-based Standard Pacific Corp. was down 1.9% to $7.98 and a market cap of $2.3 billion. Irvine-based Tri Pointe Homes was down 2.5% to $14.15 and a market cap of $2.3 billion.