Global Growth Faces Hidden Fragility as Policy Buffers Evaporate

The OECD’s September 2026 Interim Economic Outlook paints a picture of resilience bought at a high price. While the United States expects a 2.2% expansion and China maintains a 4.5% growth rate, these figures rely on thinning buffers—strategic reserves, inventory drawdowns, and temporary subsidies—that cannot be replenished indefinitely. The primary threat has shifted from an immediate energy-driven contraction to a persistent inflationary squeeze that ties the hands of monetary policymakers. With G20 inflation projected at 4.1% this year, central banks face an unforgiving trade-off: supporting sluggish growth risks reigniting price spirals, while inaction leaves economies vulnerable to further shocks.

Fiscal flexibility is similarly eroding under the weight of rising sovereign bond yields. Governments are finding that the cost of public borrowing now severely limits their ability to provide the targeted relief that kept previous downturns at bay. Compounding this, the surge in artificial intelligence investment provides a vital, yet precarious, boost to global activity. While AI spending sustains current trade momentum, it relies heavily on external financing. Should market expectations for productivity fail to materialize, the financial system may face a correction precisely when the room for policy error has narrowed to its smallest margin in years.