Executive Summary
Morgan Stanley's Global Chief Economist Seth Carpenter reveals a critical disconnect in 2026 economic forecasting: AI capital expenditure will drive demand-side growth while simultaneously preventing the disinflation the Federal Reserve needs to achieve its mandate. The firm projects US employment data will show sub-50,000 monthly job creation, potentially including negative prints, forcing the Fed to cut rates to 3% by mid-2026. This creates a productivity paradox where AI infrastructure spending sustains economic resilience but keeps inflation above the Fed's 2% target for a fifth consecutive year. Carpenter explicitly states that AI's supply-side productivity benefits won't materialize until data centers currently under construction come online in 2-3 years. The timing mismatch between immediate AI capex demand and delayed productivity gains suggests a structural inflation floor that contradicts market expectations of rapid disinflation. Europe faces similar dynamics with the ECB likely cutting to 1.5% despite President Lagarde's claims that disinflation is complete. Japan emerges as the outlier with the Bank of Japan positioned to hike in December 2025, making it the only developed market central bank tightening policy. This divergence in monetary policy trajectories, combined with AI-driven capex concentration in the US, suggests significant currency and cross-asset implications that markets may be underpricing.
Key Insights
what Seth Carpenter said“I think where we are for 2026 and it's important that we focus it on the near term is the demand side is much more important than the supply side. We think growth continues. It's supported by this business investment spending. But we still think inflation ends 2026 notably above the Fed's inflation target”
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