LONDON—Oil slipped towards $90 a barrel on Tuesday ahead of the resumption of indirect talks between the United States and Iran, which could revive an international nuclear agreement and allow more oil exports from the OPEC producer.
A deal could return more than 1 million barrels per day (bpd) of Iranian oil, equating to more than 1 percent of global supply, to the market. The nuclear talks are due to resume in Vienna on Tuesday.
