Speaking in Qatar, U.S. President Donald Trump said the U.S. was getting close to securing a nuclear deal with Iran.

President Trump indicated the U.S. was close to a deal in which Iran agrees to forgo nuclear weapons, sparking a selloff in oil prices. "You probably read today the story about Iran has sort of agreed to the terms,

The prospect of a nuclear deal between the U.S. and Iran contributed to the biggest daily drop in oil prices so far this month. But the deal, and a subsequent lift in global oil supplies, are not a sure thing.