The International Monetary Fund (IMF) warns that an AI investment bust could reduce global economic growth by up to 1.3 percentage points in 2028, according to a downside scenario, not its baseline forecast. The IMF notes U.S. AI infrastructure spending could exceed $10 trillion through 2032, while Asian economies increasingly depend on AI-driven exports. The key risk is if AI profits and productivity fail to meet expectations, falling investment could trigger a global stock selloff and economic slowdown.