Renowned Economist: AI Boom Exhibits Four Bubble Traits, Fed Could Burst It Next Year

The AI-driven frenzy fueling market and corporate spending may face a hard landing by 2026.

In an interview with Nicolai Tangen, CEO of Norges Bank Investment Management, prominent economist and Rockefeller International Chairman Ruchir Sharma stated that the current AI boom fully meets his four key indicators for identifying bubbles. A single trigger—higher interest rates—could collapse the entire bubble in 2026.

Rising rates would reduce cheap funding for AI investments while pressuring growth stock valuations.

Sharma’s "Four O's" Framework To diagnose bubbles, Sharma proposed the "Four O's" framework: overinvestment, overvaluation, over-ownership, and over-leverage. He noted that the AI boom has red flags across all dimensions.

Sharma pointed out that the surge in U.S. AI and tech spending mirrors past bubble eras like the dot-com boom. By long-term earnings and free cash flow metrics, major AI firms’ valuations are nearing bubble territory.

Meanwhile, Americans’ stock holdings as a share of wealth hit record highs, with much of the trading AI-related. Additionally, after years of cash-rich balance sheets, tech giants like Meta, Amazon, and Microsoft are now issuing massive bonds to fund the AI arms race—a classic late-bubble signal.

Sharma estimates AI drives ~60% of U.S. growth this year: companies are investing heavily in new infrastructure, while stock market wealth effects boost high-income consumption. However, stripping away AI, the underlying economy appears far weaker—precisely why Sharma views AI trades as dangerously overcrowded.

"Beyond AI, there’s significant softness in the U.S. economy," he said, adding, "America’s big AI bet had better succeed—failure would spell major trouble."

Why 2026 Could Be the Tipping Point? While Sharma avoids pinpointing bubble peaks, he notes all collapses share one cause: higher rates. Three conditions are brewing: sticky inflation remains above the Fed’s 2% target; the Fed may soon pause cuts after five years of missing targets; and AI-driven investment growth could reignite inflation.

"Even slight hints of rising rates could mean ‘game over’ for the bubble," Sharma said, as Fed hikes raise borrowing costs and slash growth stock valuations—classic bubble-bursting triggers.

He predicts this moment may arrive in 2026, aligning with other investors’ warnings—though timelines differ. Bridgewater’s Greg Jensen recently called the bubble "still ahead," while TrueBridge’s Mel Williams warned of a "massive, ugly correction" within a decade.

"Good" Bubbles Still Burst Sharma acknowledges the AI boom could be a "productive bubble" that ultimately lifts productivity, like past tech frenzies that left valuable infrastructure. But investors won’t escape unscathed.

Post-correction, he sees one standout opportunity: quality stocks—firms with high ROE, strong balance sheets, and stable earnings. These have lagged during the AI frenzy, making them Sharma’s top 2026 pick.