As of this writing on Aug. 5, the S&P 500 (SNPINDEX: ^GSPC) is trading at its highest level ever. It is on track to notch its sixth consecutive day of gains. Already, the S&P 500 index is up roughly 13% in 2026; if this bull market continues, the index will close 2026 with its fourth consecutive year of double-digit gains -- a multi-year streak not seen since the mid-90s dot-com era.
There's another similarity between today's bull market and the dot-com era's bull market. And while it doesn't mean today's market will meet the same fate as the dot-com crash, it is a strong warning that a downturn is likely coming. Here's what I mean.
Image source: Getty Images.
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