The S&P 500 was up 0.2% in midday trading to 2,556.62.
The Dow Jones Industrial Average rose 0.2% to 22,892.30.
The Nasdaq climbed 0.4% to 6,615.53.
The yield on a 10-year Treasury bond was down 1.9% to 2.28%.
The price of gold increased 0.6% to $1,304.
Anaheim-based Willdan Group (Nasdaq: WLDN) declined 5.1% to $29.21 and a $256 million market cap. Shares of the engineering and electric consulting firm are still up about 67% in the past year.
Iteris Inc. (Nasdaq: ITI) IN Santa Ana rose 3.5% to $8.02 and a $261 million market cap. Shares of Iteris, which makes systems that collect and use data on transportation and agriculture, have more than tripled in the past 16 months.