The S&P 500 was up 0.1% in midday trading to 2,090.73.

The Dow Jones Industrial Average was up 0.1% to 17,830.26.

The Nasdaq was up 0.3% to 5,116.99.

The yield on a 10-year Treasury bond was down 0.8% to 2.23%.

The price of gold was down 0.3% to $1,071

REAL ESTATE

Orange County homebuilders were up on the strength of an increase in the national S&P/Case-Shiller Home Price Index, which rose 4.9% in the 12 months ended in September, above August’s 4.6% rise. Schiller’s 10- and 20-city indexes rose between 5% and 5.5% year-over-year.

Irvine-based CalAtlantic Group was up 1.8% to $43.13 and a $5.2 billion market cap. Irvine-based Tri Pointe Group Inc. was up 1.4% to $14.18 and a $2.3 billion market cap. Newport Beach-based William Lyon Homes was up 1.5% to $17.88 and a $557 million market cap. Aliso Viejo-based New Home Co. Inc. was up 4.8% to $14.97 and a $242 million market cap.

RETAIL

Orange County retailers were trading generally positively at midday ahead of the holiday shopping season, with Irvine-based Boot Barn Holdings Inc. and Anaheim-based Pacific Sunwear of California Inc. up strongly.

Boot Barn was up 7.4% to $11.41 and a $301 million market cap. Sector strength for shoe retailers was present also as seven other publicly traded shoe retailers were up as well.

PacSun was up 17% to 41 cents and a $29 million market cap. The apparel retailer’s shares had traded at a rate by midday more than double its 90-day average and its share price is up 50% this week.