The S&P 500 was up 0.1% in midday trading to 2,085.60.
The Dow Jones Industrial Average was flat at 17,808.84.
The NASDAQ was down 0.2% to 4,828.69.
The yield on a 10-year Treasury bond was up 1.3% to 1.69%.
The price of gold was down 1.5% to $1,273.
Aliso Viejo-based New Home Co. Inc. was down 5% to $9.72 and a $201 million market cap on moderate volume.
Irvine-based ChromaDex Corp. was up 15% to $3.27 and a $124 million market cap. The ingredients maker said a 43% drop in its share price was the result of a “stock discussions website … opinion piece published anonymously and laden with misinformation, innuendo and the use of selective historical information” and Chief Executive Frank Jaksch said in a statement, “ChromaDex is exploring its options in response to this attack.”