Buffett Indicator hits 2007 high as 30‑year Treasury yields rise

The Buffett Indicator—total U.S. stock market capitalization divided by GDP—is flashing a warning level not seen since 2007, as the 30‑year Treasury yield climbs to 5.18% [2]. The metric, popularized by Warren Buffett, suggests that when the ratio spikes, stocks become expensive relative to the economy, raising the risk of a market correction.

Key takeaways

• The Buffett Indicator is at a historically high reading, echoing levels that preceded the 2007 market decline [1].
• The 30‑year Treasury yield hit 5.18%, its highest since July 2007, and has stayed above 5% for 12 straight days—the longest stretch since that year [2].
• In 2007, a similar yield surge was followed by a 20% drop in the S&P 500 and a 17% fall in the Nasdaq over the next year [2].
• Warren Buffett has long emphasized that interest rates are the most important factor in stock valuations, with higher yields compressing equity prices [2].
• Inflation pressures from the Iran conflict have pushed core PCE inflation to its highest levels in years, increasing the likelihood of Fed rate hikes in 2026 [2][3].

Buffett Indicator reaches a warning zone

Shawn Tully of Fortune explains that the Buffett Indicator—market cap divided by GDP—has risen to a level comparable to the pre‑2000 bubble era, a range Buffett warned would be “playing with fire” when it approaches 200% [1]. The original 2001 Buffett essay linked a low ratio (70‑80%) to buying opportunities, while a high ratio signaled overvaluation. Today’s reading, driven by strong equity gains (S&P 500 up 16% and Nasdaq up 25% in two months) despite macro uncertainty, suggests the market may be overvalued relative to the underlying economy [2].

Treasury yields and inflation pressure

The 30‑year Treasury yield’s climb to 5.18% marks the first time it has exceeded the 5% threshold for more than a dozen consecutive days since 2007, when it remained above 5% for 44 days [2]. Historically, such yield spikes have preceded market pullbacks; in 2007 the S&P 500 fell about 20% and the Nasdaq about 17% over the following year [2]. Buffett has repeatedly stressed that higher government bond yields reduce the present value of future earnings, tightening equity valuations [2].

The surge in yields is tied to rising inflation. The Iran conflict removed roughly 15% of global oil supply, pushing gasoline prices higher and lifting the Personal Consumption Expenditure (PCE) price index to a 3.8% year‑over‑year increase in April—the highest since May 2023 [2][3]. Core PCE inflation, which excludes food and energy, rose to 3.3%, its highest since October 2023, prompting investors to anticipate a Fed rate hike of at least a quarter point in 2026 [2][3].