U.S.-Iran deal explained: What we know — and what remains unresolved

Markets are celebrating a preliminary U.S.-Iran agreement intended to end their war that triggered a global economic downturn and lasted nearly four months. Stocks surged on Monday, as oil prices and bond yields fell. No deal has yet been signed, though the sides have agreed a "memorandum of understanding" and stood down militarily, and the critical Strait of Hormuz is to be reopened as part of the deal, according to U.S. President Donald Trump . …