The divergence in global monetary policy has reached its widest point in years, and the catalyst is not domestic economic conditions but a war in the Middle East that most central bankers can do nothing about.
Emerging market central banks are raising interest rates at a pace not seen since the post-pandemic inflation surge, even as the Federal Reserve, European Central Bank, and Bank of Japan remain in holding patterns. The driver is brutally simple: the Iran conflict has pushed oil prices above $110 per barrel, and for import-dependent economies, that translates directly into headline inflation that no amount of forward guidance can talk away.
The arithmetic of imported inflation
For a country like Turkey, which imports nearly all its energy, every $10 increase in Brent crude adds roughly 0.8 percentage points to annual inflation within six months. Brazil, despite being a net energy exporter, faces similar pressure through fuel subsidies that strain fiscal accounts and force compensating monetary tightening. The result is a wave of rate hikes that looks coordinated but is really just parallel desperation.
The Turkish central bank has already added 300 basis points this year. Brazil's Copom raised its Selic rate last month and signaled more to come. South Africa, India, and the Philippines have all shifted hawkish in recent weeks. These are not preemptive moves against overheating domestic demand—they are defensive actions against an external shock.
The Fed's uncomfortable silence
Meanwhile, the Federal Reserve faces a different calculus. American consumers feel higher gas prices, but the US economy is far less exposed to energy imports than it was a generation ago. Chair Powell has acknowledged the geopolitical uncertainty but emphasized that the Fed cannot set policy based on conflicts it cannot predict or control. The implicit message: emerging markets are on their own.
This creates a feedback loop that compounds the pain. As EM central banks hike rates, capital that might otherwise flow to higher-yielding assets stays parked in dollar-denominated instruments, strengthening the greenback and making dollar-priced oil even more expensive in local currency terms. The Turkish lira and South African rand have both weakened significantly against the dollar this year, amplifying the very inflation their rate hikes are meant to combat.
Our take
The Iran conflict has exposed a structural vulnerability that years of globalization papered over: when commodity prices spike, the pain is distributed with brutal inequality. Developed economies with diversified energy mixes and reserve currencies can wait out the storm. Emerging markets must choose between crushing growth with rate hikes or letting inflation erode living standards. Neither option is good, and the Fed's studied neutrality—however defensible on narrow mandates—looks increasingly like abandonment. The global monetary system was never designed for a world where regional wars export inflation asymmetrically. That design flaw is now everyone's problem.
