The S&P 500 was up 0.1% in midday trading to 2,182.68.
The Dow Jones Industrial Average was up 0.1% to 18,538.19.
The NASDAQ was up 0.3% to 5,228.61.
The yield on a 10-year Treasury bond was down 2% to 1.55%.
The price of gold was up 0.4% to $1,347.
San Clemente-based ICU Medical Inc. was up 6.7% to $125.35 and a $2 billion market cap. The infusion therapy device maker said it earned $16.6 million on $96.7 million in revenue in its most recent quarter, compared with earnings of $13.6 million on $83.8 million in revenue year-over-year.
Newport Beach-based Acacia Research Corp. was up 5.7% to $6.33 and a $319 million market cap on high volume. The patent services company by midday had traded shares at about twice its 90-day average. It said last week that a subsidiary, Parthenon Unified Memory Architecture LLC, had settled a patent license dispute with China-based ZTE Corp.