The S&P 500 was up 0.4% in midday trading to 1,937.61.
The Dow Jones Industrial Average was up 0.6% to 16,580.32.
The NASDAQ was up 0.1% to 4,548.14.
The yield on a 10-year Treasury bond was down 2.7% to %1.70%.
The price of gold was up 0.2% to $1,241.
Newport Beach-based William Lyon Homes was up 17% to $10.46 and a $329 million market cap. The builder said fourth-quarter revenue grew 12% to $403 million and net income was up 46% to $26 million; full-year revenue was up 23% to $1.1 billion and net income grew 28% to $57 million.
Irvine-based CoreLogic Inc. was up 3% to $36.07 and a $3.2 billion market cap. The real estate information services provider said fourth-quarter revenue grew 13% to $391 million and net income was up 130% to $38 million; full-year revenue was up 9% to $1.5 billion and net income grew 43% to $128 million.
Newport Beach-based Pacific Health Care Organization Inc. was up 15% to $8.10 and a $6.4 million market cap on high volume at midday compared with the workers compensation services company 90-day average.