Sensex Today | Stock Market LIVE Updates: 80 Nifty Midcap 100 constituents, and 67 Nifty Smallcap 100 constituents ended with losses on Wednesday. 25,800 was touted to be a key support level for the Nifty, but it has closed below that level. Sustaining above that will remain the key for preventing any further fall towards 25,500.