Sensex Today | Stock Market LIVE Updates: Today is the Nifty weekly expiry, and three markets will react to results from TCS and HCLTech that were reported after market hours on Monday. For the Nifty, sustaining above 25,800 is the key; even 25,500 now becomes a bigger support. For the Nifty Bank, the 59,500 mark on the upside and 59,000 on the downside are the key ranges.