Investors are now betting that the Federal Reserve will cut interest rates just once more this year, a drastic shift in expectations since late 2024.

After the arrival of a less costly A.I. model from China, U.S. markets and academics are wrestling with the ultimate economic value of the technology.

The electric car company run by Elon Musk is facing increasing competition, but investors have focused mostly on the prospects for Tesla’s self-driving technology.

The tech industry has had an insatiable appetite for Nvidia’s chips over the last two years. But the feast may be over sooner than many had expected.

Oil and gas executives welcomed President Trump’s early moves on energy policy, but many said they did not plan to increase production unless prices rose significantly.

Stiffer competition for the tech giants at the forefront of the artificial intelligence boom prompted investors to reassess the companies’ sky-high valuations.

The fast-growing popularity of the Chinese artificial intelligence software hit shares in tech giants like Nvidia, as Silicon Valley worried about what comes next.

Our columnist suggests how to think about stocks and bonds during a presidency that is signaling a deep devotion to profits.

Industrial growth, the stock market and the rupee are sinking, and most consumers earn too little to buoy them, stymieing India’s drive to become a developed economy.

But high medical costs contributed to results that disappointed Wall Street, and the company’s stock fell on the news that it had made less than analysts expected.

Vivek Ramaswamy, Elon Musk’s partner in an effort to cut government costs, could make decisions that ultimately make him and his investors richer.

The largest banks, including JPMorgan Chase, Wells Fargo and Goldman Sachs, reported bumper profits on Wednesday.

A December gain of 256,000 blew past forecasts, and unemployment fell to 4.2 percent. But markets recoiled as interest rate cuts seemed more distant.

Sizzling returns may well continue, but our columnist suggests that it would be wise to prepare for the next storm.

The unexpected action is intended to tamp down a potential bubble in the bond market fueled by investors shunning riskier assets like stocks and real estate.

Constellation Energy’s deal to buy Calpine is being driven by fast-rising demand for electricity in part by the technology industry’s investments in artificial intelligence.

Sales of the company’s cars are flagging, but investors are focusing on the potential of autonomous driving and Mr. Musk’s ties to President-elect Donald J. Trump.

Readers have concerns that President-elect Trump’s policy agenda will unsettle stocks. If you’re tempted to make big portfolio moves, revisit 2020.