The US-Iran ceasefire agreed just last week is buckling under tit-for-tat military strikes, and the consequences hit your wallet fast.

• What happened: US aircraft struck Iranian missile and drone storage sites and coastal radar stations near the Strait of Hormuz on Friday, hours after Iran attacked the Singapore-flagged cargo ship M/V Ever Lovely. Iran's Revolutionary Guards retaliated by targeting US military positions in the region, warning of "stronger...