Dow futures tumble over 800 points on fears over new COVID variant detected in South Africa

MarketWatch Nov. 26, 2021 

https://www.marketwatch.com/story/dow-futures-tumble-400-points-on-fears-over-new-covid-variant-detected-in-south-africa-11637908694

A heavily-mutated Covid variant emerges in southern Africa: 

Here’s what we know so far

https://www.cnbc.com/2021/11/26/covid-variant-emerges-in-south-africa-heres-what-we-know-so-far.html