IMHO, neither of these answers are relevant. The one by Arpan is not clear and the other one is about open interest in Nifty futures.
Yesterday and today (22-23 Aug 2016) There is a major sellof in Wellspun due to it losing out on business from a large US-based customer (Target). I see a large sell quantity and buy quantity 0.
Also, market depth shows several offer prices and no bid prices.
But, if the shares are changing hands, don’t there need to be buyers?