The S&P 500 was up 0.6% to 4,711.36 during midday trading.
The Dow Jones Industrial Average increased 0.6% to 36,297.04.
The Nasdaq climbed 0.7% to 15,963.50.
The yield on a 10-year Treasury bond rose 0.3% to 1.628%.
The price of gold decreased 0.5% to $1,856.80.
The price for a barrel of oil rose 0.4 % to $81.23.
Irvine-based electric vehicle maker Rivian Automotive Inc. (Nasdaq; RIVN) rose 9.7% to $163.81 apiece for a market cap of about $148 billion. The shares have more than doubled in value since last week’s trading debut with its market capitalization now surpassing that of Volkswagen AG.
HEALTHCAREIrvine urology-focused medical device maker Axonics Modulation Technologies Inc. (Nasdaq: AXNX) rose 5.6% to $62.38 per share for a market cap of $2.9 billion. The shares have gained about 25% since the start of the year.