U.S. Treasury yields fell to 4.23% after President Trump's blockade of the Strait of Hormuz—the chokepoint for one-fifth of global oil supply—sent investors worldwide into government bonds and gold.1 The move mirrors flight-to-safety patterns seen during previous Middle East crises, when European bunds and Japanese government bonds rallied alongside Treasuries.
The bond rally reversed within hours as Brent crude surged above $100 per barrel, the highest since 2022.1 Traders from London to Singapore recalculated inflation risks, with European markets particularly exposed given the continent's energy import dependence. Gold climbed alongside Treasury demand—a rare dual safe-haven bid reflecting acute geopolitical uncertainty.1
The dollar strengthened against the euro, yen, and sterling as global investors sought liquidity in the world's deepest financial markets.2 The move compounds challenges for emerging market central banks already managing capital outflows and currency pressures from elevated U.S. rates.
Central banks worldwide face the crisis playbook dilemma: geopolitical shocks typically warrant easier policy to cushion growth, while energy price spikes threaten inflation targets from Washington to Wellington. The European Central Bank and Bank of England, still battling stubborn inflation, have less policy space than the Fed to accommodate energy shocks.
The Treasury yield whipsaw highlights competing forces. Initial safe-haven flows eased financial conditions globally, giving central banks breathing room. Oil's surge threatens stagflation—the 1970s scenario of weak growth and high inflation that paralyzed policymakers for years. Asian economies heavily dependent on Middle East oil imports face particular vulnerability.
Global portfolio managers are stress-testing allocations as the crisis unfolds. Traditional defensive positioning—overweight bonds and gold, underweight equities—assumes flight-to-quality dominates. The current episode challenges that framework by making both deflationary collapse and inflationary spiral plausible depending on crisis duration.
Rate futures markets show investors expect the Fed and other major central banks to tolerate inflation overshoots rather than tighten into a geopolitical shock. The dollar's strength may partially offset imported inflation for U.S. consumers while exporting it to trading partners—a dynamic that could strain international monetary coordination if the crisis persists.