03 December 2010
The Sensex is an "index". What is an index? An index is basically an indicator. It gives you a general idea about whether most of the stocks have gone up or most of the stocks have gone down.
The Sensex is an indicator of all the major companies of the BSE.
The Nifty is an indicator of all the major companies of the NSE.
If the Sensex goes up, it means that the prices of the stocks of most of the major companies on the BSE have gone up. If the Sensex goes down, this tells you that the stock price of most of the major stocks on the BSE have gone down.
Just like the Sensex represents the top stocks of the BSE, the Nifty represents the top stocks of the NSE.
Just in case you are confused, the BSE, is the Bombay Stock Exchange and the NSE is the National Stock Exchange. The BSE is situated at Bombay and the NSE is situated at Delhi. These are the major stock exchanges in the country. There are other stock exchanges like the Calcutta Stock Exchange etc. but they are not as popular as the BSE and the NSE.Most of the stock trading in the country is done though the BSE & the NSE.
Besides Sensex and the Nifty there are many other indexes. There is an index that gives you an idea about whether the mid-cap stocks go up and down. This is called the “BSE Mid-cap Index”. There are many other types of indexes.
How to calculate BSE SENSEX?
This is to explain how the value of the “BSE Sensex” or “sensitive index” is calculated. If you are not sure what we mean by the Sensex or what the Sensex is all about, you can find this out by reading our “How to make money in the stock market?” article.
The Sensex has a very important function. The Sensex is supposed to be an indicator of the stocks in the BSE. It is supposed to show whether the stocks are generally going up, or generally going down.
To show this accurately, the Sensex is calculated taking into consideration stock prices of 30 different BSE listed companies. It is calculated using the “free-float market capitalization” method. This is a world wide accepted method as one of the best methods for calculating a stock market index.
The whole story behind the calculation of the BSE and NSE points is a very complex one, however, it can be understood if done with full attention.
According to the standard practice a base price is selected of both the Sensex and Nifty stock indices. There share prices are also taken .Here Weights are given to every share after which the daily or the timely variance is calculated and published in the market.