Fed Holds Interest Rates — Iran Crisis Structurally Obstructs

📡 THE SIGNAL — What Happened

Why it matters: The world's largest central bank is caught between geopolitical risks and inflation, entering a phase where receding rate cut expectations will have cascading effects on global financial markets and the Japanese economy. The Fed's policy stagnation marks a watershed moment that will determine the direction of the global economy in 2026.

• Monetary Policy — The Federal Reserve Board (FRB) decided to keep the policy interest rate unchanged at the FOMC meeting on March 18, 2026.
• Monetary Policy — Fed Chair Powell made it clear that rate cuts would not occur until inflation is confirmed to have settled.
• Geopolitics — The escalating situation in Iran is recognized as a factor driving up energy prices.
• Energy — Iran-related geopolitical risks are pushing up crude oil prices, increasing inflationary pressure in the U.S.
• Market Trends — Financial markets widely anticipate a slower pace of future rate cuts.
• Economic Outlook — Chair Powell described the impact of rising energy prices due to the Iran situation on the American economy as "unclear."
• Monetary Policy — The Fed had been gradually implementing rate cuts since late 2025 but has shifted to a cautious stance in 2026.
• Inflation — The U.S. CPI (Consumer Price Index) continues to trend above the Fed's 2% target.
• International Finance — Expectations of a slower Fed rate cut pace are sustaining upward pressure on the dollar, raising concerns about its impact on emerging market currencies and the yen.
• Energy Markets — WTI crude oil futures prices have risen to the $85 per barrel range amid the escalating situation in Iran.
• Bond Markets — The U.S. 10-year Treasury yield remains elevated in the 4.3% range even after the decision to hold rates.
• Japanese Economy — A prolonged Fed rate hold will sustain yen depreciation pressure by maintaining the Japan-U.S. interest rate differential, also influencing the Bank of Japan's policy decisions.

To correctly understand the Fed's decision to hold interest rates this time, it is necessary to historically review the major trends in American monetary policy in the 2020s and the structural impact of geopolitical risks on macroeconomic policy.

Since the COVID-19 pandemic in 2020, the Fed implemented unprecedented large-scale monetary easing, lowering the policy interest rate to near zero and conducting massive asset purchases. While this ultra-loose policy supported a rapid economic recovery, it also led to inflation rates surging to over 9% by 2022, a 40-year high. The Fed then embarked on a rapid rate-hiking cycle starting in March 2022, implementing an historically aggressive monetary tightening by raising the policy rate to 5.25-5.50% in just 16 months.

This rate-hiking cycle paused in late 2023, and the era of "higher for longer" interest rates continued throughout 2024. As inflation gradually declined, market expectations for rate cuts grew, and the Fed finally began cutting rates in late 2025. However, this rate-cutting cycle did not proceed as rapidly as initially expected by the market.

Behind this was the rapidly changing geopolitical environment from 2025 to 2026. In particular, the escalating situation in Iran fundamentally altered the risk to Middle Eastern energy supply. The Strait of Hormuz is a strategic chokepoint through which approximately 20% of the world's oil trade passes, and instability in this region directly and immediately impacts crude oil prices. The deterioration of the Iran situation since early 2026 pushed crude oil prices into the high $80s, making the energy-driven inflation resurgence risk, which the Fed most fears, a reality.

Historically, central banks have repeatedly faced situations where they had to combat inflation stemming from geopolitical risks. During the First Oil Crisis in 1973, the oil embargo by Arab oil-producing nations caused inflation to skyrocket. Then-Fed Chair Arthur Burns succumbed to political pressure and failed to tighten sufficiently, ultimately leading to stagflation. In 1979, Paul Volcker became Fed Chair and curbed inflation with the drastic measure of raising the policy rate to nearly 20%, but at the cost of a severe recession.

The dilemma facing Chair Powell in 2026 echoes the lessons of the Volcker era. Once inflation expectations become unanchored, controlling them incurs a far greater cost. The strong institutional memory of not repeating the mistakes of the 1970s lies behind Chair Powell's explicit statement that "rate cuts will not occur until inflation is confirmed to have settled."

At the same time, the current Fed is in a politically complex position. Political pressure on central bank independence historically intensified under the Trump administration, and the Fed is walking a tightrope between calls for rate cuts from the political side and policy decisions prioritizing inflation suppression.

Even more importantly, this decision to hold rates has ripple effects on the global financial environment. A slower pace of Fed rate cuts will maintain a strong dollar, increase capital outflow pressure from emerging markets, and mean prolonged exchange rate risk for Asian economies, including Japan. As the Bank of Japan explores a cautious rate-hiking path, a scenario where the Japan-U.S. interest rate differential does not narrow will rebound on the Japanese economy in the form of sustained yen depreciation and accompanying import inflation.

Thus, the Fed's decision to hold rates is not merely a single policy judgment but a nexus where multiple structural factors—geopolitical risks, inflation expectations, political pressure, and the international financial order—intersect.

The delta: By explicitly positioning the rise in energy prices due to Iran's geopolitical risks as a variable in its inflation assessment, the Fed has expanded the conditions for resuming its rate-cutting cycle beyond "domestic economic data" to include "the resolution of geopolitical risks." This marks a turning point that structurally alters the rate cut path that markets had priced in.