The S&P; 500 rose 1.1% to 4,582.58 in midday trading.
The Dow Jones Industrial Average increased 0.9% to 35,320.58.
The Nasdaq climbed 1.4% to 14,542.08.
The yield on a 10-year Treasury ticked 0.3% higher to 1.833%.
The price of gold was flat at $1,842.80.
The price for a barrel of oil rose 0.3% to $87.25.
Irvine-based fitness franchisor Xponential Fitness, Inc. (NYSE: XPOF) jumped 11% to $16.74 apiece and a market cap of $400 million. The company announced Tuesday plans for global expansion in partnership with management software platform Glofox. The company currently operates in 10 countries outside of the U.S.
Sonendo, Inc. (NYSE: SONX) rose 13% to $7.36 per share and a $193 million market cap. Shares have now risen 35% since Jan. 10 when the company announced preliminary fourth-quarter revenue ranging from $9.7 million to $9.9 million, topping the average analyst estimate of $9.2 million. The Laguna Hills-based maker of dental technologies went public in October at $12 a share.