BSE sysmatically loosing market share to NSE. In FY2020, cash market share of BSE has reduced now further to single digits. One reason for me extit BSE was lost market dominance even in cash market. While it has niche segment of 1500 odd compnaies which are listed only on BSE and as monopoly charge very high exchange fees, it does make an optimum business to invest for me. Even liquidities on those counter is very low and so it daily turnover. Enclosing a table from Rakesh Mohan paper on Indian financial market for IMF.
The link for the report
http://www.rakeshmohan.com/docs/WP1.pdf
Discl: My view may be biased due to my exit from BSE. Not a SEBI registered advisor, Not recommending any investment action. Reader shall do his/her own due diligence before taking any investment action