The Iran war puts the petrodollar regime to the test

The petrodollar system, established in 1974 after the Yom Kippur War, cemented the U.S. dollar as the global reserve currency by securing Saudi Arabia's agreement to price oil in dollars in exchange for U.S. military and economic support. This arrangement led to significant petrodollar recycling, with Gulf states investing oil revenues in U.S. Treasuries—Saudi Arabia alone accounted for 12% of the U.S. federal deficit between 1974 and 1976. Today, the system faces pressure from China's push to price oil in yuan and Iran’s symbolic use of the yuan in Strait of Hormuz tolls, threatening dollar dominance.

Understand how a 50-year-old oil-dollar pact still shapes global finance and what its unraveling could mean for inflation, interest rates, and U.S. economic power.

1. 01The petrodollar system emerged from secret 1974 U.S.-Saudi negotiations that linked oil pricing in dollars to U.S. security and economic guarantees, reinforcing dollar supremacy.
2. 02Petrodollar recycling helped finance the U.S. deficit and kept Treasury markets liquid, with Saudi Arabia becoming a top foreign buyer of U.S. debt in the 1970s.
3. 03Current geopolitical shifts—China’s yuan-denominated oil deals with Saudi Arabia and Iran’s use of yuan—pose symbolic and structural risks to the dollar’s reserve status.