I purchased shares of IIFL Holding in October 2017 and the company, after de-merging allotted shares of newly created companies IIFL Finance, IIFL Securities and IIFL Wealth Management sometime in 2018 after 31-01-2018. I sold some shares of IIFL Wealth after it was listed in 2019. So for the purpose of LTCG calculation how do I find the Fair Market Value ?