The U.S.-Israeli assault on Iran is piling pressure on Egypt’s precarious finances by hiking energy costs, hindering exports and pushing foreign investors to sell off treasuries, interviews with analysts and a review of official data show. The shock of the conflict is particularly acute for Egypt, a country of nearly 120 million that many Western powers view as a linchpin of regional stability, and where previous upheavals had knock-on effects on migration flows, Suez Canal trade and security along the Gaza border.