The fintech giant's share price has slumped more than 84% since it filed for a blockbuster IPO — India’s largest — eroding $14.5 billion of investor wealth

The Reserve Bank of India's order could be the first step in cancelling the bank's licence and follows years of non-compliance with central bank rules

Buffett's exit comes after a string of selldowns for Paytm, including stake cuts by Japanese conglomerate SoftBank Group and the exit of China's Alibaba Group

SoftBank's Vision Fund is the second-largest shareholder of Paytm, whose shares have tumbled more than 60% since it went public a year ago