Shares of One97 Communications Ltd, Paytm’s parent company, on November 18 made a weak market debut and tumbled over 27% during the day from the issue price of ₹2,150. Ant Group-backed Paytm’s ₹18,300 crore IPO was oversubscribed 1.89 times on the last day of India’s biggest share sale last week. “Paytm, formally called One97 Communications debuts today at exchanges which …