Shell's profits for the second quarter of the year have more than doubled after the Iran war pushed up oil prices. But energy prices have also seen sharp swings during the conflict, which has boosted Shell's trading business. Shell chief executive Wael Sawan said the company's "operational performance enabled very strong results during another quarter of severe disruption in global energy markets". Shell and other energy giants such as BP and Norway's Equinor have seen bumper profits this year, partly down to trading on oil price swings. These big movements in the oil price can widen the gap between buying and selling prices which typically enables traders to make bigger profits.