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 relative calm in the markets may not survive upheaval in the A.I. sector and a deluge of disruptive Trump policies, our columnist says.

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

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

Optimistic guesses about the future are not forecasts, our columnist says.

Mired in a battle to contain surging prices, the central bank also needs to be nimble enough for the economic downturns to come, our columnist...

Many funds hold stakes in MicroStrategy, which behaves like Bitcoin’s wilder cousin. This may not be what you want in your retirement portfolio, our columnist...

With Friday’s gains included, November was the best month in a year for the S&P 500.

The president-elect cares about financial markets, our columnist says. That gives investors a restraint on his decisions, even if it’s a tenuous one.

Faced with unconventional and disruptive proposals, investors are figuring out how to place their bets.