Nifty May ended at a 2 points premium at 4090. The May series added 1.1% (3.34 lakh) shares in open interest (OI). Total OI now stands at 305.43 lakh. Next month (June), OI stood at 7.30 lakh, with the addition of 26,900 shares on Monday.On the index options front, the Nifty 4100 and 4200 strike prices saw 50% concentration of the total open interest in Calls. Total OI in Calls stood at 98.97 lakh, of which, OI at 4100 Call was 30.35 lakh and OI at 4200 Call was 20.22 lakh.On the other hand, the Nifty 4000 Put accounted for 27% concentration of the total OI in Puts. The total OI in Puts stood at 119.23 lakh, of which, OI at 4000 Put was 32.47 lakh. OI for Nifty 4100 Put stood at 20.37 lakh (17.1%) and OI for 3900 Put was 16.32 lakh (13.7%).The Nifty OI Put-Call ratio is 1.20.
