Premarket: Oil dives on U.S.-Iran hopes as global stock surge stalls

Oil tumbled nearly 4% as a potential U.S.-Iran nuclear deal raised the prospect of increased global crude supply on Thursday, while stocks markets took a well-earned breather following their weeks-long recovery run. Brent futures dropped over $2 to under $64 a barrel as U.S. President Donald Trump, who is on a Middle East tour, said he was getting very close to securing a deal with Iran – and that Tehran had "sort of" agreed to the terms. Ali Shamkhani, an adviser to Iran's Supreme Leader Ayatollah Ali Khamenei, had said in an NBC interview that the country would commit to…