The S&P; 500 was up 0.3% to 4,362.56 during midday trading.
The Dow Jones Industrial Average rose 0.1% to 34,397.13.
The Nasdaq increased 0.7% to 14,566.32.
The yield on a 10-year Treasury bond fell 2.6% to 1.539%
The price of gold increased 2% to $1,795 an ounce.
The price for a barrel of oil fell 0.2% to $80.52.
Alignment Healthcare Inc. (Nasdaq: ALHC) climbed 8.3% to $18.42 and a $3.7 billion market cap. Volume at the Orange-based provider of Medicare insurance plans was three times the daily average.
Irvine-based Tarsus Pharmaceuticals Inc. (Nasdaq: TARS), jumped 12% to $30.13 and a $620 million market cap. Raymond James analysts recently chose Tarsus, a maker of ophthalmic drugs, as one of three stocks likely to gain more than 60% in the coming months.