Oil prices collapsed to more than two-decade lows on Monday as traders grow concerned that storage facilities are reaching their limits, while signs that the coronavirus may have peaked in Europe and the US were unable to help Asian equities extend their recent advances.

US crude benchmark West Texas Intermediate (WTI) briefly plunged almost 20 per cent to below $14.50 – its lowest since 1999 – as stockpiles continue to build owing to a crash in demand caused by the Covid-19 pandemic.

Analysts said this month’s agreement between top producers to slash output by 10 million barrels per day was having little impact on the oil crisis because of lockdowns and travel restrictions that are keeping billions of people at home.

WTI was hit particularly hard as its main US storage facilities in Cushing, Oklahoma, were filling up, with Trifecta Consultants analyst Sukrit Vijayakar saying refineries were not processing crude fast enough.

There are also plenty of supplies from the Middle East with no buyers as “freight costs are high”, he told AFP.

“I think we will see a test of the 1998 lows at $11 sooner rather than later,” Oanda senior market analyst Jeffrey Halley told AFP.

And AxiCorp’s Stephen Innes added: “It’s a dump at all cost as no one . . . wants delivery of oil, with Cushing storage facilities filling by the minute.

“It hasn’t taken long for the market to recognise that the Opec+ deal will not, in its present form, be enough to balance oil markets.”

Stock markets were mostly lower despite governments starting to consider how and when to ease lockdowns that have crippled the global economy.

Italy, Spain, France and Britain reported drops in daily death tolls and slowing infection rates, while Germany began allowing some shops to reopen and Norway restarted nurseries.

“We are scoring points against the epidemic,” said French Prime Minister Edouard Philippe, but he insisted “we are not out of the health crisis yet”.

Mounting evidence suggests that the lockdowns and social distancing are slowing the spread of the virus. That has intensified planning in many countries to begin loosening curbs on movement and easing the crushing pressure on national economies.

Shanghai, Mumbai and Bangkok rose while London, Paris and Frankfurt also edged up in early trade. The Cambodia Securities Exchange index gained 1.14 per cent.

But most other markets were in retreat.

Hong Kong shed 0.2 per cent, while Tokyo fell more then one per cent as Japan struggles to contain the disease, while Sydney shed 2.5 per cent. Seoul dropped 0.8 per cent and Manila dropped one per cent. There were also losses in Taipei, Singapore, Wellington and Jakarta.

“The longer investors have to contemplate future economic issues while they wait for more countries to be on the downward slope of the pandemic curve, the more scope there is of risk assets pricing in a difficult future,” said Chris Iggo of AXA Investment Managers UK.

Investors are keeping an eye on Washington, where Congress and the White House are working towards a $450 billion economic relief plan for small business to add to the trillions already pledged to support the economy.

Big-name companies including IBM, Netflix and Coca-Cola are due to deliver their earnings reports.