The S&P 500 gave up an early gain to finish down 0.4%. The benchmark index, which set 57 record highs in 2024, racked up a 23 ...

24 Exchange, a new stock exchange, announced Wednesday that it will launch next year. The exchange could eventually offer 23-hours-a-day stock trading, pending final regulatory approval.

The year featured many familiar winners, such as Big Tech, which got even bigger as their stock prices kept growing. But it ...