A2M was added to index on 22 June 2020, announcement made on 11 June 2020.
You can work out for yourself whether or not the inclusion had a positive price effect and what kind of volume was done.
There will be many millions of shares to be disposed off imo as we move towards 20 September.
A2M must go down as one of the shortest stay stocks on the S&P/ASX 50 index!
As for FBU, you are indeed right - has proven to be a great investment stock in the last 2 years!