The S&P 500 was flat in midday trading at 2,359.17.
The Dow Jones Industrial Average was down 0.2% to 20,655.98.
The NASDAQ was up 0.2% to 5,887.10.
The yield on a 10-year Treasury bond fell 1% to 2.38%.
The price of gold fell 0.3% to $1,252.
Banc of California Inc. in Irvine was down 3.7% to $20.17 and a $1 billion market cap on average volume.
CombiMatrix Corp. in Irvine was up 15.6% to $5.55 and a $16 million market cap. The molecular diagnostic test maker had by midday traded shares at triple its average volume. Its share price has doubled year-to-date.
Kush Bottles Inc. in Santa Ana was up 7.1% to $2.55 and a $127 million market cap on above-average volume. The maker of packaging products for the cannabis industry this week said it would quadruple its office space and move to Garden Grove. Its shares are up about 50% year-to-date.