The Sensex and Nifty indices represent important stock market indexes in India. They are benchmarks used to measure the performance of the stock market. The BSE Sensex, also known simply as the Sensex, is associated with the Bombay Stock Exchange. The NSE Nifty, or just Nifty, is tied to the National Stock Exchange of India. Each of these indices has a designated base year which is pivotal in calculating their performance over time. For the BSE Sensex, the chosen base year is 1978-79, while for the NSE Nifty, the base year is 1995. These base years serve as the reference points, and all calculations of index value growth or decline use these years as the standard. Understanding the base years is critical for comprehending how these indices track the market’s behavior and provide insights into economic trends.