Sell SPY by May 28, 2026.

[https://www.nytimes.com/interactive/2026/02/26/business/stock-market-sp-500-nvidia-tech-bubble-crises.html](https://www.nytimes.com/interactive/2026/02/26/business/stock-market-sp-500-nvidia-tech-bubble-crises.html) To understand how abnormal and worrisome this moment might be, The New York Times analyzed data from S&P Dow Jones Indices that compiled the market values of the companies in the S&P 500 in December 1999 and August 2007. Each date was chosen roughly three months before a downturn to capture the weighted breakdown of the index before crises fully took hold and values fell. The companies that make up the index have periodically cycled in and out, and …