Iran War Rewires the Oil Dollar Relationship

The Iran war is disrupting one of the market’s usual relationships: oil and the US dollar are rising together.

Normally, a stronger dollar weighs on oil because crude is priced in dollars and becomes more expensive for buyers using other currencies. But after roughly 11 weeks of Middle East conflict and disruption to a vital shipping route, geopolitics is now overpowering the traditional macro playbook.

Key insights:

• Brent crude has risen around 45 percent since the first strikes against Iran in late February, as disruption around the Strait of Hormuz pushed energy risk premiums sharply higher.
• Brent was quoted near USD 107.46 per barrel, up about 1.65 percent in the latest session, keeping inflation, freight, aviation, fuel, and petrochemical costs under pressure.
• The Bloomberg Dollar Index also rose around 1 percent, supported by safe haven demand and investor focus on the US position as a major oil producer.
• The Brent crude dollar correlation has reached its strongest positive level since the dollar index was launched in 2005.
• This is unusual because the oil dollar relationship was mostly negative through much of Q1, before turning positive in early March and staying positive since then.
• The IEA has warned that the oil market may remain in a sharp supply deficit until October, while Hormuz remains a critical chokepoint for around 20 percent of global oil supply.

The main takeaway is that geopolitical risk has temporarily changed the way oil and currency markets are trading. When energy security becomes the dominant market driver, investors can buy both oil and the dollar at the same time. The next signal will be whether Hormuz risks ease, or whether higher oil prices keep feeding inflation and delaying central bank easing.