Saudi Arabia Riyals

Oil eased on Tuesday, having posted its largest gain in six weeks the previous day, while tension flared between Saudi Arabia and Iran, just as the Saudi crown prince tightened his grip on power.

Oil prices largely held on to gains on Tuesday after posting the biggest rise in six weeks a day earlier, buoyed by moves by Saudi Arabia’s crown prince to tighten his grip on power and rising tensions between the kingdom and Iran.

At least three OPEC members disagree with Saudi Arabia and Russia on the need to pump more oil, OPEC sources said.

World stocks edged lower on Friday on signs that U.S. tax reforms could be delayed after Senate Republicans unveiled a plan that differed significantly from the House of Representatives’ version.