Global stocks rally as COVID-19 vaccines lift hope, dollar eases

By Herbert Lash

NEW YORK (Reuters) - The dollar weakened and world stock markets rallied on Monday on encouraging signs of progress in developing a COVID-19 vaccine, while several multi-billion dollar deals also helped lift the spirit of investors after the downdraft in the past two weeks.

Gold jumped almost 1% as the dollar slid and bond yields were stable as investors gauge how the U.S. Federal Reserve will put its new approach to monetary policy into practice and keep its dovish stance at this week's policy meeting.

Pfizer Inc <PFE.N> and BioNTech SE <22UAy.F> on Saturday proposed expanding their Phase 3 COVID-19 vaccine trial to about 44,000 participants, while increasing the diversity of the trial population.

Drugmaker AstraZeneca <AZN.L> also said on Saturday it has resumed British clinical trials of its COVID-19 vaccine, one of the most advanced in development, after getting the green light from safety watchdogs.

Enrollment of new patients and other trial procedures for AstraZeneca's pivotal U.S. trial were being rescheduled until at least midweek and it was not clear how long it would take for a U.S. investigators to complete a probe, sources told Reuters.

"The market reacts positively to any vaccine news," said Tim Ghriskey, chief investment strategist at Inverness Counsel in New York. "We're going to see a lot more vaccines come out, and that is what really is helping the markets."

The World Health Organization reported a record one-day increase in global coronavirus cases on Sunday, with the total rising by 307,930 in 24 hours. The biggest increases were from India, the United States and Brazil.

"There is still some caution in markets because U.S. virus numbers appear to be picking up again in some states," said Seema Shah, chief strategist at Principal Global Investors.

"The vaccine news is positive but there is a lot of skepticism about when they become widely adopted," Shah said.

Plans by Nvidia Corp <NVDA.O> to buy British-based chip designer Arm from Japan's SoftBank Group Corp <9984.T> for as much as $40 billion, a deal expected to reshape the global semiconductor landscape, also drove sentiment. Nvidia shares, which have more than doubled this year, added 5.8%.

Oracle <ORCL.N> surged 4.3% as the cloud services company said it would team up with China's ByteDance to keep TikTok operating in the United States, beating Microsoft Corp <MSFT.O> in a deal structured as a partnership rather than an outright sale.