The S&P 500, Dow, and Nasdaq climbed at midday after the government reported the U.S. economy grew more than expected in the fourth quarter.

American Airlines Group ( AAL ) soared as the airline beat forecasts for earnings, revenue and guidance on higher demand for air travel.

Shares of IBM ( IBM ) gained after the tech giant posted better-than-expected results and said its artificial intelligence (AI) business boomed.

United Rentals ( URI ) shares were up as the company reported profit and sales that were above estimates as it benefited from a 14% rise in equipment rental income.

Humana ( HUM ) was the worst-performing stock in the S&P 500, and shares of rivals sank as well, after Humana warned that higher medical costs and government regulations could hurt profits through 2025.

Shares of Tesla ( TSLA ) sank as the electric vehicle (EV) maker missed profit and sales estimates and warned of a slowdown in volume growth in 2024.

Boeing ( BA ) shares dropped after federal regulators blocked the plane maker from expanding production of its 737 Max planes following a mid-flight incident involving a Boeing 737 Max 9.

Oil and gold futures advanced. The yield on the 10-year Treasury note fell. The U.S. dollar climbed versus the euro, pound, and yen. Prices for most major cryptocurrencies lost ground.