For a few weeks this summer you could look at the oil price and forget the Iran war had ever happened. In June America signed a deal with Iran, waiving sanctions on its enemy’s oil exports in exchange for ships’ safe passage through the Strait of Hormuz. As tankers rushed to exit the Gulf, a sudden “mini-glut” pushed Brent futures, the international benchmark, down to their pre-war level of $72 a barrel.
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