** Exchange operators BSE BSEL.NS and Multi Commodity Exchange of India (MCX) MCEI.NS shares down 4.4% and 3.8%, respectively

** Brokerage firm Angel One ANGO.NS drops 3%

** Central bank to go ahead with stricter rules on bank lending for proprietary trading, RBI governor says

** "The impact on proprietary trading - where firms trade using their own money - is the most severe; banks are prohibited from directly funding these trades, and any guarantee issued must be fully secured by cash or government bonds," HDFC Securities had said in a note

** BSEL, ANGO and MCEI rated "buy" on average by analysts, per data compiled by LSEG

** YTD, BSEL, ANGO and MCEI up 47.6%, 39.5% and 25%, respectively