Sensex Today | Stock Market Live Updates: The last 30 minutes of today’s session will be crucial, as the NSE rebalancing will coincide with the Closing Auction Session (CAS). Analysts believe that a short-covering move will only happen once the Nifty closes above the 23,000 mark, else there is a fear that the index could drop further towards the 22,500 mark, where the highest Put Open Interest currently stands.