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The US stock market is now worth more than four times the entire American economy. That ratio has never been this high, not before the dot-com bust, not before Black Monday, not before the pandemic. And JPMorgan’s top strategist thinks investors should be paying attention.
David Kelly, Chief Global Strategist at JPMorgan Asset Management, calculated that the market value of all US corporate equity now exceeds 400% of GDP. For context, that figure stood at 244% just before the pandemic, 204% at the peak of the dot-com bubble in 2000, and a quaint 74% before the 1987 crash.
A valuation gap with no historical precedent
Kelly has been tracking this metric for a while. In a September 2025 interview, he noted that US corporate equity had already topped 300% of GDP, which was itself a record. The jump from 300% to above 400% in under a year suggests an acceleration that even seasoned market observers find difficult to rationalize.
Kelly’s warning didn’t arrive in isolation. It landed just days after a McKinsey Global Institute study found that global wealth has been growing far faster than the economies that are supposed to underpin it. The McKinsey analysis pegged total global wealth at approximately $600 trillion, or roughly 5.4 times global GDP.
Perhaps the most striking detail from McKinsey’s research: since 2000, 36% of the $400 trillion increase in global wealth consists of what the firm calls “paper gains.” These are increases in asset prices that aren’t tied to new investment, new factories, new infrastructure, or productivity improvements.
Why the gap between Wall Street and Main Street keeps widening
Low interest rates for much of the post-2008 era pushed investors into equities because bonds offered almost nothing. Even as rates climbed sharply in 2022 and 2023, equity markets absorbed the shock and kept climbing, driven by AI enthusiasm and a narrow group of mega-cap technology stocks.
Every prior extreme in this ratio, whether it was 74% in 1987, 204% in 2000, or 244% in 2020, preceded significant market turbulence. The 1987 crash was a one-day event. The dot-com bust unfolded over years and wiped out trillions. The pandemic crash in March 2020 was sharp but short-lived, partly because central banks responded with unprecedented stimulus.
What this means for markets and risk assets
Kelly has suggested that elevated equity valuations, combined with high corporate profit shares, create vulnerability to economic shocks. If profit margins compress, if interest rates stay elevated, or if economic policies shift in ways that reduce corporate earnings, the adjustment in stock prices could be severe.
The McKinsey finding about paper gains adds another layer. If more than a third of the world’s wealth gains over the past quarter century are disconnected from productive economic activity, the entire asset price framework, stocks, real estate, and yes, tokens, rests on a foundation that’s thinner than aggregate numbers suggest.
The last time JPMorgan’s Kelly flagged this metric at 300% of GDP, it took less than a year to blow past that level. Whether 400% proves to be a ceiling or just another waypoint on the path higher will depend on whether the real economy can eventually catch up to what markets are already pricing in.
Disclosure: This article was edited by Editorial Team. For more information on how we create and review content, see our Editorial Policy.
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