Paytm, the digital payment app's parent company, One97 Communications, witnessed a significant setback on Thursday as its shares nosedived by 20 per cent, reaching 650 rupees each. This drop was triggered by Paytm's decision to reduce its small-ticket or personal loan offerings. The company made this move in response to the recent tightening of lending rules by the central bank. This pronounced decline marks the company's most significant single-day setback since its listing day.