The Data Don't Match the Story
The K-shaped economy — where wealthy Americans prop up consumer spending while poorer households pull back — has become the defining narrative of 2025's economic expansion. One problem: Economists are now warning that the story has outrun the evidence. "The narrative of K-shaped growth appears to be exaggerated, downplaying risks of a fragile expansion," a team at Barclays wrote in February. If they're right, policymakers and CEOs are operating under a dangerous illusion about how resilient the economy actually is.
The wealthiest 20% of Americans have accounted for a steady 40% of total consumer spending for the past 25 years — a figure that remained unchanged in 2025, even as asset prices boomed, according to Pantheon Macroeconomics' Samuel Tombs. The bottom 20% still account for roughly 9% of spending, the same share they've held for decades. In other words, the divergence everyone's talking about hasn't actually worsened. The rich have always spent disproportionately — that's not new news.
Where Prediction Markets Get It Wrong
If wealthy Americans were truly driving the expansion more than usual, spending categories dominated by high earners should be the fastest growing. They're not. Pantheon found that the wealthy's share of a spending category was "a remarkably poor predictor" of its growth. Apparel — where the top 20% account for only a third of spending, below their overall share — surged 6% in 2025. Auto sales, where the wealthy represent two-thirds of all spending, rose just 2%, below the overall average. The most striking finding: spending categories where lower-income households account for the largest share actually grew faster.
This matters for prediction market traders because the K-shaped narrative has seeped into how CEOs explain spending patterns and how policymakers think about risk. Getting this wrong makes the economy look more resilient than it is, with less of a shock absorber if conditions turn quickly. The consensus has been that wealthy households, insulated by stock market gains and rising home values, could keep the expansion alive even if middle- and lower-income consumers faltered. If Barclays and Pantheon are correct, that safety net doesn't exist — and markets pricing in a soft landing may be overconfident.
From K to E: The New Shape of Spending
Some economists are proposing an alternative framework. Heather Long argues the U.S. economy is now "E-shaped" — diverging into three tiers of consumer behavior instead of two. The middle class, she says, is "spending in a nervous way," creating a distinct pattern from both wealthy and lower-income households amid an ongoing affordability crisis. This three-tier model may better explain why aggregate spending data don't show the bifurcation the K-shaped narrative predicts. What to watch: If the K-shaped story is indeed overstated, the next consumer spending miss will hit harder than markets expect — because the wealthy safety net was never as thick as consensus believed.