10,000 days of Sensex trading: Some interesting facts 10,000 days of Sensex trading: Some interesting facts Every Rs one lakh invested on April 1, 1979, would have become Rs 4.22 crore now. This translates into an annualised return of 15.02 per cent. Shashikant Singh / Friday, June 24, 2022 / Article rating: 4.4 In this journey of little more than 43 years, Sensex has witnessed many business cycles and has become a sort of proxy for the Indian economy and the pulse of domestic equity market.