BSE Q2 FY27 CONCALL: MANAGEMENT SEES 65–70% EBITDA MARGINS AS SUSTAINABLE, PLANS 170–190 ADDITIONAL COLOCATION RACKS; OCTOBER INDEX OPTIONS PREMIUM ADTV HITS RECORD ₹35,481 CR, IPO PIPELINE EXCEEDS ₹1.5 LAKH CR & MSCI DERIVATIVES LAUNCH AWAITS REGULATORY APPROVAL