Great news today: "us pharmaceutical giant Pfizer and German biotech firm BioNTech have announced that their coronavirus vaccine is more than 90% effective in preventing Covid-19 among those who have no evidence of previous infection."
https://www.cnbc.com/2020/11/09/covid-vaccine-pfizer-drug-is-more-than-90percent-effective-in-preventing-infection.html#close

And we see an instant reaction of the market to such a statement.