This is not the stock market growth. It is the number of worldwide coronavirus. It took 6 mths before the global number of cases hit 10 million. But in just 43 days, the number doubled to 20 million.
The US, Brazil & India recorded the highest number of cases while the US, Brazil & Mexico registered the highest number of deaths from this disease.
Meanwhile, countries that had the virus under control have experienced a resurgence. Several have also experienced second and third wave infections. New Zealand had 101 days of zero infections but suddenly discovered a new cluster from a family of 4. They returned to lock down mode immediately.