The S&P 500 was down 0.2% in midday trading to 2,270.93.
The Dow Jones Industrial Average was down 0.2% at 19,856.64.
The NASDAQ was down 0.5% to 5,544.49.
The yield on a 10-year Treasury bond fell 1.3% to 2.35.
The price of gold rose 1.4% to $1,216.00.
Aliso Viejo-based Microsemi Corp. was down 2.7% to $54.78 and a $6.3 billion market cap on moderate volume. The company makes semiconductors.
Mission Viejo-based Auxilio Inc. was up 34% to $3.60 and a $98 million market cap. The company manages documents and works in cybersecurity for hospitals; it plans to buy healthcare cybersecurity firm CynergisTek in Austin, Texas for about $34 million.