Look at he high of 9817.18 Feb 19 2020 before the drop to where it is July 15 2020 at 10,430 a gain of 6.25 %. The index experienced a loss of about 30.12% and yet required a gain of 43.09% to make up for a 30.12% loss. So I don't understand how you conclude a gain of 50%.This last image corresponds to the last 6 months of the chart I posted earlier (message #82), just presented with a different scale. It shows the same growth, but with a flatter scale. Here the same period from the website I used in message #82:
These are just 6 months. Earlier I used a chart over a period of 5 years, as I think it gives more context. It shows that the market started to climb at the end of 2016 and it shows the crash at the end of 2018. That latter period is particularly interesting at it is the most recent crash prior to covid-19.