IMF models three AI scenarios: bust case costs 1.3 points of global growth by 2028
shashib · x · 2026-10-18
The IMF this week modeled three AI scenarios, and analyst Shashi Bellamkonda's read is that the core message is "patience": every scenario assumes payoffs lag spending, and a vendor's funding determines how much patience it can pass on to enterprise customers.
- Optimistic case: productivity gains with contained inflation; middle case: the build-out hits chip supply limits, so inflation and rates rise before productivity arrives; bust case: up to 1.3 percentage points shaved off global growth in 2028. The IMF didn't say which is most likely.
- Key numbers: 2026 global growth forecast of 3.1%; well-run adoption could add 0.5 point to world growth per year; roughly $9T of U.S. AI buildout through 2032.
- MD Kristalina Georgieva framed the timing gap as diffusion: people overestimate short-term delivery and underestimate long-term gains, so some upset is inevitable.
- Takeaway for enterprise buyers: check whether your vendor is funded from operating cash flow and can wait out a slow payoff.
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