IMF World Economic Outlook raises 2026 global growth to 3.1% on AI spending, and models a 20% US stock drop if the payoff never comes

The International Monetary Fund on Tuesday, Oct. 13, raised its forecast for global growth this year to 3.1%, up from the 3.0% it projected in July, and kept 2027 at 3.4%, CNBC reported from the fund’s World Economic Outlook briefing in Bangkok. Growth is still slower than last year’s 3.5%. The fund credits investment in artificial intelligence, which it calls a “demand impulse,” for holding the world up.

“The global economy has been resilient, but that resilience is reaching its limits,” said Silvana Tenreyro, the IMF’s research director.

The fund describes the AI boom as a “large, front-loaded demand shock,” spending that flows into semiconductors, data centers and electricity before broad productivity gains arrive. If those productivity gains fail to arrive, the IMF’s scenario has US stocks falling 20%, global growth running 1.1 percentage points below the baseline by 2028, and Asia 1.7 points lower.

Where the growth is coming from

The upgrade is narrow. Just 32 economies now account for 95% of global growth, down from 54 in April, CNBC reported. Taiwan’s forecast is 10.7% this year. South Korea’s jumps to 3.3% from 1.1% in 2025 on chip demand. The US holds at 2.3% in both years, and the euro zone sits at 1.1%.

The buyers are concentrated too. The US and China make up more than three-quarters of net demand for imports of chips and AI-related equipment, the Associated Press reported, and Tenreyro called the outlook “highly uneven.” The fund also says calm markets may partly reflect “AI-related exuberance.”

Markets in the region didn’t wait for the fine print. South Korea’s Kospi sank as much as 7% on Tuesday and closed 5.5% lower, per AP.

What the number is actually measuring

A growth forecast counts spending when it happens. A company that orders a data center adds to this year’s output the day the concrete is poured and the chips are bought, whether or not the software running on them ever makes anyone better at their job.

So the 3.1% books the AI build-out as growth now, and the thing the build-out is supposed to deliver, more output per worker, shows up in the report only as a risk to be modeled. The fund’s own baseline even assumes the boom moderates, according to AP.

If AI spending keeps going and the productivity follows, the IMF’s numbers are conservative. If spending slows before the payoff is visible, the countries the upgrade depends on, Taiwan and South Korea most of all, are the same ones selling the equipment, and their growth leans on two buyers.

The scenario works as a bill: the fund is telling governments how much of their 2026 is riding on a bet whose outcome it cannot see yet.

The cushion is thinner

There is less room to absorb a miss than there used to be. Public debt in advanced economies is projected to reach 115% of GDP by 2031, up from 108% in 2025, CNBC reported. Inflation is forecast at 4.7% this year and 4.1% in 2027, above July’s 3.9% for next year.

IMF managing director Kristalina Georgieva, separately, put AI’s effect on work in stark terms, saying around 40% of jobs would be “either augmented or downgraded or eliminated,” a change she called a “slow moving tsunami,” per AP. That’s the productivity story told from the worker’s side, and it’s the side the growth number hasn’t priced.

The IMF usually publishes the World Economic Outlook twice a year with updates in between, and its next update is the first chance to see whether the gains it is waiting for have started to show, or whether the 20% scenario has moved closer to the baseline.

Sources

• CNBC: IMF sees milder global slowdown as AI boom offsets war hit (Anniek Bao; Oct 12-13, 2026)
• AP via Yahoo Finance: IMF raises its forecast for world growth this year but warns of risks from AI boom and debt (Elaine Kurtenbach; Oct 13, 2026)
• IMF: World Economic Outlook publications