[Editor’s note: This story was updated at 3:35 p.m. CT Dec. 10.]

Oil prices climbed nearly 3% on Dec. 10, with Brent surging above $50/bbl for the first time since early March, fueled by hopes of a faster demand recovery as countries start to roll out COVID-19 vaccines.

The bullish sentiment offset a large increase in U.S. crude inventories that showed there was still ample supply available.

Britain began vaccinations this week and the U.S. could start inoculations as soon as this weekend. Canada on Dec. 9 approved its first vaccine and said initial shots would be delivered starting next week.

Brent crude rose $1.39, or 2.8%, to settle at $50.25/bbl, gaining for a third day. WTI crude futures in the U.S. rose $1.26, or 2.8%, to settle at $46.78/bbl.

Both benchmarks reached their highest levels since March, with the contracts posting session highs of $51.06/bbl and $47.74/bbl, respectively. However, their relative strength indexes showed both had moved into overbought territory.

Investors shrugged off the Dec. 9 weekly report on U.S. oil inventories that showed a massive 15.2 million-barrel rise in crude stocks. Analysts had expected a 1.4 million-barrel drop.

"It is not every day that the market ignores weekly builds of U.S. crude inventories," said Bjornar Tonhaugen, Rystad Energy's head of oil markets. "Fast-tracking vaccinations is raising hopes that oil demand will benefit quicker and the North American markets are major consumers."

Concern over an attack on an Iraqi oil field also lent support. Two wells at a small field were set ablaze by explosives on Dec. 9, but overall production from the field was not affected.

Oil has recovered from historic lows reached in April when the pandemic hammered demand, helped by a record supply-cut deal by OPEC and allies, known as OPEC+.

OPEC+ will further ease its supply restrictions in January by adding an extra 500,000 bbl/d although the easing is more gradual than previously agreed, to provide additional support to the market.