(March 24, 2026)

The world saves in dollars in large part because it pays in dollars. The dollar‘s dominance in cross-border trade is arguably built on the petrodollar: globally traded oil is priced and invoiced in USD. This arrangement can be traced to a deal struck in 1974 where Saudi Arabia agreed to price oil in USD and invest surpluses in USD assets, in exchange for US security guarantees. Because oil is a core input to global manufacturing and transport, there is a natural incentive for global value chains to dollarize, and global surpluses to accumulate in USD.

The foundations of the petrodollar regime have been under pressure even before this conflict. Most Middle East oil is now sold to Asia not the US; sanctioned oil from Russia and Iran has already been trading off dollar rails; Saudi Arabia has been localizing defence, and experimenting with forms of non-dollar payment infrastructure such as Project mBridge.

The current conflict may expose further fault lines, by challenging the US security umbrella for Gulf infrastructure and the maritime security for global trade in oil. Damage to Gulf economies could encourage an unwind in their foreign asset savings held largely in dollars. In this context, reports that the passage for ships through the Strait of Hormuz may be granted in exchange for oil payments in yuan should be closely followed. The conflict could be remembered as a key catalyst for erosion in petrodollar dominance, and the beginnings of the petroyuan.