Global Benchmark Brent crude jumped above 3% on Monday to a four-year high above $80 a barrel after Saudi Arabia and Russia ruled out any immediate increasing amount of production despite calls by US President Mr . trump actually in operation to lift global supply.

The Organization of the Petroleum Exporting Countries and non-Opec states, including top producer Russia, gathered in Algiers on Sunday for your meeting that ended without having any formal recommendation for virtually every additional supply boost to counter falling supply from Iran.

“The market’s still being driven by concerns about Iranian and Venezuelan supply,” said Gene McGillian, director of consumer research at Tradition Energy in Stamford. “The failure within the producers to handle that adequately a few days ago is developing a buying opportunity.”

Brent crude settled up $2.40 or 3.1% at $81.20 a barrel, after touching an intraday a lot of $81.39, the highest since November, 2014. US light crude settled up $1.30, or 1.8%, higher at $72.08.

Opec leader Saudi Arabia along with its biggest oil-producer ally not in the group, Russia, on Sunday effectively rebuffed Trump’s interest in moves to chill the market industry.

“I really don’t influence prices,” Saudi Energy Minister Khalid al-Falih told reporters on Sunday.

Trump said a week ago that Opec “must get prices down now!”, but Iranian Oil Minister Bijan Zanganeh said on Monday Opec had not responded positively to Trump’s demands.

“Now it is increasingly evident, that industry by storm producers often raise output, the industry will be confronted with supply gaps over the following three-six months that it’s going to ought to resolve through higher oil prices,” BNP Paribas oil strategist Harry Tchilinguirian told Reuters Global Oil Forum.

Commodity traders Trafigura and Mercuria said Brent could rise to $90 per barrel by Christmas and pass $100 noisy . 2019, as markets tighten once US sanctions against Iran are fully implemented from November.

JPMorgan said US sanctions on Iran may lead to a loss 1.5 million barrels each day, while Mercuria warned that up to Two million bpd might be bumped out from the market.

Concerns about production shortfalls are encouraging traders to place more long bets, boosting Brent prices, said Brian LaRose, a technical analyst at United-ICAP.

“It is the seventh time over the past few weeks we have challenged the highs,” he said, making reference to individual monthly contracts, continuation contract. If Brent prices climb past $82 a barrel, he said prices as many as $90 would have been a near-term possibility.

Some have said softening demand from trade tensions between US and China to offset decrease in Iranian supply, but Tradition’s McGillian asserted that unless trade tensions show symptoms of eroding Chinese demand, oil prices will surge further.

US commercial crude oil inventories are at their lowest since early 2015. While US oil production is near a record high of 11 million bpd, subdued US drilling points toward a slowdown in output.