The S&P 500 was up 0.9% to 1,948.77.
The Dow Jones Industrial Average was up 1.4% to 16,429.35.
The Nasdaq was up 0.2% to 4,743.20.
The yield on a 10-year Treasury bond was up 2.1% to 2.16%.
The price of gold was down 0.8% to $1,145.
Orange County homebuilders were up as U.S. Federal Reserve Chairwoman Janet Yellen reassured markets that the national economy was strong enough to sustain an increase by year-end in short-term interest rates.
Irvine-based Standard Pacific Corp. was up 2.5% to $8.62 and a $2.4 billion value on its common stock. Irvine-based Tri Pointe Group Inc. was up 2.3% to $14.14 and a $2.2 billion market cap. Newport Beach-based William Lyon Homes was up 1.7% to $22.88 and a $720 million market cap.
Irvine-based aortic device maker Endologix Inc. was down 5.1% to $12.65 and an $817 million market cap on high volume.
Irvine-based printed circuit board maker Multi-Fineline Electronix Inc. was up 5.1% to $17.32 and a $404 million market cap on higher-than-average volume.