Nifty futures showed bullish optimism with high rollover rates in May. Nifty Bank saw lower rollover numbers, signaling investors are booking profits. Auto, Cement, Pharma, PSU Banks and Realty sectors are more likely to perform better in the next series, with Grasim and Berger Paints receiving the highest rollover, ONGC, ICICI Lombard and Hero Motor having the least. The Nifty's upside potential could reach 18,800 to 19,000 in the coming period. FIIs remain confident in the Indian markets, while RIL's rally was influenced mostly because of a consolidation breakout and double-bottom formation.