Ketan Parekh was a stock broker from Mumbai who manipulated the Indian stock market in late 1999-2001, in what became known as the Ketan Parekh scam. He formed a network of brokers to target and artificially inflate the prices of 10 stocks by as much as 10 times their original values. Parekh used a simple borrowing mechanism known as the badla system to fund his stock purchases, pledging the inflated stock prices as collateral to obtain more funds. However, when the stock market crashed in 2000, Parekh was unable to maintain the prices and his scheme collapsed, leading to his arrest in 2001 and conviction in 2008 for market manipulation. The scam had major implications, including a 700 point fall in the