Morning Business Report: Dow closes at record high as investors await Strait of Hormuz shipping dealInvestors are closely watching negotiations between Iran and Oman over a potential agreement to reopen shipping through the Strait of Hormuz. (LILAMAX)- Investors are closely watching negotiations between Iran and Oman over a potential agreement to reopen shipping through the Strait of Hormuz. Under the proposed agreement, ships entering the Persian Gulf would travel through a channel controlled by Iran, while vessels leaving the Gulf would use a route near Oman. The possibility of a deal helped lift investor optimism, with the Dow Jones Industrial Average closing at a record high for the third consecutive day. Meanwhile, the U.S. Department of Education says some student loan borrowers mistakenly received notices claiming their accounts were past due.