US stocks just suffered one of their most stunning reversals in 32 years

Only four times in the more than 32-year history of the SPDR S&P 500 ETF has the fund opened at least 1.5% higher only to end the session down 1.5% or more.

And one of those days was today, with early enthusiasm over Nvidia’s strong earnings report turning into a wave of selling as speculative assets, chief among them Bitcoin, cratered and dragged everything down with them. The S&P 500’s winners in particular saw heavy selling. Among the 15 stocks in the index that are up at least 70% year to date, the average performance on Thursday was down 5.6%.

The other occasions where US stocks have suffered such a violent turnabout:

April 8 of this year (the bottom, year to date!), when the White House said tariffs on China were going up to above 100%, kneecapping a nascent bounce-back attempt after a 10% drubbing in the three days after the Rose Garden tariff announcements. President Donald Trump would go on to announce that he was slashing reciprocal tariffs for 90 days the following session.

And the other two such instances both occurred in October 2008 (on the 7th and the 9th), as the fallout from the unfolding financial crisis was spreading after the prior month’s collapse of Lehman Brothers and the VIX Index, Wall Street’s so-called “fear gauge,” was routinely above 50, making immense volatility par for the course.