S&P BSE SENSEX is the primary stock market index to measure the performance of India's major companies traded on the Bombay Stock Exchange (BSE).
International Markets
Like most indices, the Sensex was started with an arbitrary number of 100 on Jan 1, 1979. The number and the number at any point in time is almost irrelevant. What is interesting is how much the number changes over a period of time. Thus, if Sensex grows from 10,000 to 15000 over a period of 1 year, it would mean that the wealth of Indian shareholders grew 50% in 1 year.
The relationship between Sensex and Economy:
Sensex is quick shorthand for Indian stock market. It is an indicator of how good Indian economy is performing and is generally seen as a "leading indicator". A leading indicator means that the Sensex movement will tell about the future performance of the overall economy. Thus, if Sensex is growing, the Indian economy has a high probability of growth in the near future.
Here is the 13-year performance of the Sensex. You can quickly see that the fortunes of our country go parallel with the market.
Why do we need an index?
A Stock Exchange Index is a quick shorthand to measure & compare the performance of various markets. Using the indices for various markets, we can reduce each country to a single aggregated number and then look at how these numbers move. For instance, here is a tool that we have built to compare the performance of different stock markets in the world using indices such as the Sensex. (Red is bad, green is good). You can decipher quickly that India, Brazil and Europe have performed poorly in the past 5 years, while US, Australia and Chile have been among the best performance - by this measure.
International Markets
How is the Sensex Computed?
The Sensex is computed from the stock market prices of 30 of the biggest companies in India (including ICICI Bank, Reliance, Infosys Limited, Oil and Natural Gas Corporation (ONGC), TCS, State Bank, Tata Motors (company), Maruti Suzuki India Limited). When the prices of the stocks of these top 30 companies go up by 1%, then the Sensex number goes up 1%. For instance, if the Sensex number was 10000 yesterday, then today's number will be 10100 if India's top 30 companies grow by 1%. In the same way, if India's top 30 companies drop by 1%, then Sensex would drop to 9900 from 10000.Like most indices, the Sensex was started with an arbitrary number of 100 on Jan 1, 1979. The number and the number at any point in time is almost irrelevant. What is interesting is how much the number changes over a period of time. Thus, if Sensex grows from 10,000 to 15000 over a period of 1 year, it would mean that the wealth of Indian shareholders grew 50% in 1 year.
The relationship between Sensex and Economy:
Sensex is quick shorthand for Indian stock market. It is an indicator of how good Indian economy is performing and is generally seen as a "leading indicator". A leading indicator means that the Sensex movement will tell about the future performance of the overall economy. Thus, if Sensex is growing, the Indian economy has a high probability of growth in the near future.
Here is the 13-year performance of the Sensex. You can quickly see that the fortunes of our country go parallel with the market.