Sanjeev Prasad, senior executive director & co-head of Kotak Institutional Equities, told NDTV that 20 per cent of the incremental earnings growth of Nifty-50 companies in FY16 is going to come from ONGC only. Kotak believes the pricing formula, which has been announced for the first quarter of FY16 for ONGC, may get extended for the entire fiscal.