Two of India's richest men, Mukesh Ambani and Gautam Adani, lost nearly $7 billion of their wealth on Monday as Sensex crashed over 1,700 points and Nifty 50 fell over 500 points. According to Forbes, Adani lost $4.2 billion as all of his group companies ended lower while Ambani took a $2.7 billion hit as Reliance Industries fell 3.35%.