HomeRetirementBrett Arends's ROIBrett Arends's ROIEnergy exposure may help you sleep better at nightJuly 8, 2026, 1:56 p.m. ETPresident Trump Wednesday declared the cease-fire with Iran over following attacks on commercial vessels in the Strait of Hormuz. Photo: Getty ImagesYou might want to own a dedicated energy fund in your IRA or 401(k) if you want to cushion yourself from shocks like the one that just hit following the apparent collapse of the cease-fire with Iran.Regular stocks and bonds are down on the news, but energy futures and energy stocks are up. They march to different beats: That’s the gold standard of so-called “diversification.”