Stocks are still climbing, but the warning lights are flashing brighter. The S&P 500, Nasdaq Composite and Dow Jones Industrial Average have all risen since late July, even as two of the market’s best-known valuation gauges are now showing patterns last seen in the dot-com bubble.
That is why Warren Buffett is back in the conversation. The Buffett indicator now sits at a record high of around 232%, while the S&P 500 Shiller CAPE ratio has been hovering above 40 since May 2026. Those levels matter because Buffett once wrote in Fortune that when the market nears 200% on his preferred measure, investors are “playing with fire.”
The latest move higher has been strong enough to punish anyone who got out too early. Since late July alone, the S&P 500 has gained 6%, the Nasdaq Composite 9% and the Dow Jones Industrial Average 4%. Since July 2025, the Buffett indicator has stayed above 200%, yet the S&P 500 has still delivered more than 27% in total returns. That is the reason the warning and the answer can exist in the same market: valuation may be stretched, but timing the end is a separate problem.
That is also why investors are searching for Motley Fool guidance now. Bank of America’s most recent Global Fund Manager Survey found about 45% of fund managers saw an AI bubble as the biggest tail risk facing the market in 2026, and the current valuation setup is drawing comparisons with the late 1990s, when the S&P 500 Shiller CAPE ratio peaked at around 44. The market is not only expensive by history; it is expensive while fears about AI and future returns are growing louder.
The uncomfortable part is that the same history used to warn investors can also caution against panic. An investor who bought an S&P 500 ETF or index fund in January 2000 lived through a bear market that lasted roughly two and a half years after the dot-com bubble popped in March, but that same investor would still be up more than 760% by today. That is the case for staying invested through the noise: a crash can arrive, and the long run can still reward patience.
There is no clean calendar for when a downturn would start, and no valuation level that tells investors exactly when to jump. What the current setup does suggest is simpler and harder to act on: if the market keeps rising, leaving early can mean missing gains that never come back. The more durable response, the one the data supports, is to keep investing consistently and let quality stocks do the work over time. In this framework, quality means businesses with steady earnings power, strong balance sheets and the ability to keep generating cash even when valuations compress.
For investors staring at a record Buffett indicator and a CAPE ratio near late-1990s extremes, the real decision is not whether risk exists. It does. The decision is whether to try to outrun it and risk missing the market’s next leg higher, or stay in place and accept that volatility is the price of the return.
