Shares of One 97 Communications, the parent of digital payment firm Paytm, made a weak stock market debut on Thursday. The stock opened for trading at Rs 1,950 on the NSE, marking a decline of 9.3 per cent or Rs 200 from its issue price of Rs 2,150. Paytm shares extended losses after opening as the stock fell as much as 23 per cent, from issue price, to hit an intraday low of Rs 1,655.