current top 3 stock HDFCBANK + ICICIBANK + SBIN = 70.43% WEIGHTAGE IT REQUIRE TO REDUCTION UP TO COMBINELY 45% CAP APROXIMATELY 25.43% CUT ALSO SEBI PROPOSE THAT NON BENCHMARK INDECIES MUST HAVE ATLEAST 14 CONSTITUENT STOCKS, UP FROM THE CURRENT 12 IN BANK NIFTY. (POTENTIAL CHANCES FOR INCLUSION OF UNION BANK OF INDIA AND YESBANK)