During a severe geopolitical crisis that spikes oil prices, the United States' self-sufficiency in energy, food, and water makes it a relative safe haven. Rather than simply de-risking, a strategic defensive move is to reallocate capital from more vulnerable regions like Europe and Asia to the U.S.

A world of persistent inflation and hawkish central banks creates a prime environment for carry trades, even with moderating growth. Within the G10, currencies of energy exporters with high yields, like the Australian Dollar and Norwegian Krone, are particularly attractive. Their carry advantage over the US dollar is at its highest level in nearly a decade.

A strengthening US dollar doesn't negate the FX carry trade. The optimal strategy shifts to using low-yielding currencies like the Euro, Swiss Franc, or Yen as funders to buy high-yielders, insulating the trade from direct USD strength and capturing cross-currency differentials.

This strategy combines two seemingly opposing views: bullish on risk/beta and bullish on the US dollar. On days when weak data hurts the dollar, the risk-on component performs, providing portfolio diversification. This construction hedges against different market states, as both views can work simultaneously under certain conditions.

Beyond the typical 'flight to safety' in the US dollar during a crisis, a more nuanced currency play exists. Currencies of commodity-exporting countries, such as the Brazilian Real and Australian Dollar, are positioned to benefit from the positive terms-of-trade impact of higher energy prices.

An oil shock centered on the Strait of Hormuz will cripple energy-dependent economies in Europe and Asia far more than the U.S. This economic divergence will lead to a sharp appreciation of the US Dollar against currencies like the Euro, creating a powerful flight-to-safety rally in the dollar itself.

Markets often over-focus on relative interest rate policy when analyzing currencies. During an energy crisis, the macroeconomic effect of rising oil prices is a far more powerful driver. The disproportionate negative impact on energy-importing economies like Japan and Europe will weigh on their currencies more than any central bank actions.

The conflict has shifted the FX regime from pro-cyclical to risk-off, making the US dollar attractive as a high-yielder, defensive asset, and energy exporter. Beyond the dollar, the primary theme is pairing energy exporting currencies (like AUD, NOK, BRL) against energy importing currencies (like EUR), which are most vulnerable.

Prolonged energy price shocks from the Iran conflict create a stagflationary environment. This enhances the US dollar's appeal as a defensive asset, especially as government bonds fail to hedge risk, forcing a shift from a previously bearish stance.