What is Bombay Stock Exchange(BSE) ?
The S&P BSE SENSEX (S&P Bombay Stock Exchange Sensitive Index), also-called the BSE 30 or simply the SENSEX, is a free-float market capitalization-weighted stock market index of 30 well-established and financially sound companies listed on BSE Ltd.
The 30 component companies which are some of the largest and most actively traded stocks, are representative of various industrial sectors of the Indian economy. Published since 1 January 1986, the S&P BSE SENSEX is regarded as the pulse of the domestic stock markets in India. The base value of the S&P BSE SENSEX is taken as 100 on 1 April 1979, and its base year as 1978–79
On 25 July 2001 BSE launched DOLLEX-30, a dollar-linked version of S&P BSE SENSEX. As of 21 April 2011, the market capitalisation of S&P BSE SENSEX was about
29733 billion (US$455 billion) (47.68% of market capitalisation of BSE), while its free-float market capitalisation was 15690 billion (US$240 billion).
The 30 component companies which are some of the largest and most actively traded stocks, are representative of various industrial sectors of the Indian economy. Published since 1 January 1986, the S&P BSE SENSEX is regarded as the pulse of the domestic stock markets in India. The base value of the S&P BSE SENSEX is taken as 100 on 1 April 1979, and its base year as 1978–79
On 25 July 2001 BSE launched DOLLEX-30, a dollar-linked version of S&P BSE SENSEX. As of 21 April 2011, the market capitalisation of S&P BSE SENSEX was about
29733 billion (US$455 billion) (47.68% of market capitalisation of BSE), while its free-float market capitalisation was 15690 billion (US$240 billion).Calculation
The BSE constantly reviews and modifies its composition to be sure it reflects current market conditions. The index is calculated based on a free float capitalisation method, a variation of the market capitalisation method. Instead of using a company's outstanding shares it uses its float, or shares that are readily available for trading. As per free float capitalisation methodology, the level of index at any point of time reflects the free float market value of 30 component stocks relative to a base period. The market capitalisation of a company is determined by multiplying the price of its stock by the number of shares issued by of corporate actions, replacement of scrips, etc.
The index has increased by over ten times from June 1990 to the present. Using information from April 1979 onwards, the long-run rate of return on the S&P BSE SENSEX works out to be 18.6% per annum, which translates to roughly 9% per annum.
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