Mumbai: The Indian equity markets posted notable gains on Friday over easing crude prices and a phased US-Iran agreement. At the closing bell, the Sensex was up 315 points, or 0.43 per cent, at 73,895. The Nifty added 77 points, or 0.34 per cent, to close at 23,140. Nifty Bank added 0.26 per cent or.