The market meltdown hypothesis, popular in the 1990s, held that equity sales by retiring baby boomers would swamp demand from their juniors, crashing the market. It seemed wrong for a while, partly because of globalisation.

U.S. family offices, the private investment arms of wealthy families, had 86% of their portfolios in North America in the first quarter, up from 74% in 2020.

U.S. stocks saw a broad selloff Wednesday afternoon after the yield on the 10-year Treasury crossed above 4.5% rattling investors. The benchmark is a barometer for everything from mortgages to personal loans and now signaling higher borrowing costs.

Shorting stocks has been a coin-flip in 2025, with almost 50% of short positions unprofitable this year, S3 Partners said.

Investors of clean-power stocks are running for the exits after a massive tax and spending bill that would gut former President Joe Biden’s landmark climate law narrowly passed the House of Representatives.

Shares of quantum computing companies rocketed higher Thursday, led by IonQ, whose chief executive said it aims to become the Nvidia of quantum computing.

The S&P 500 is lagging an MSCI index tracking global stocks by more than 10 percentage points this year, according to Dow Jones Market Data. If that gap holds through year-end, it would be the widest annual margin since 1993.

One of the most widely held stocks by investment managers is Microsoft. Billionaires Stephen Mandel of Lone Pine Capital and Chase Coleman of Tiger Global Management