The IMF's counterparty in Myanmar is the Central Bank of Myanmar, and the source expressed hope it can maintain its independence from the country's finance ministry.
Shionogi & Co gained 1.12% after the drug maker said it sold the development and marketing rights for a COVID-19 treatment to California-based biotech BioAge Labs Inc.
The IMF was slightly more optimistic than in its last set of forecasts in October, upgrading the outlook for global growth in 2021 by 0.3 percentage points to 5.5%.
The IMF estimates Britain was the worst-hit of the world's seven largest advanced economies last year, suffering a 10.0% decline in output.
Close to 90 million people are likely to fall below the extreme poverty threshold during 2020-2021.
The forecast would likely rise further if the US Congress passes a $1.9 trillion relief package proposed by newly inaugurated President Joe Biden, economists say.
Saudi Arabia itself has estimated its economy could swing back to growth of 3.2% this year after a 3.7% contraction in 2020.
The IMF said that multiple vaccine approvals and the launch of vaccinations in some countries in December had boosted hopes of an eventual end to the pandemic.