Thursday, February 28, 2008

How the Sensex is Calculated

Suppose the Index consists of only 2 stocks: Stock A and Stock B.

Suppose company A has 1,000 shares in total, of which 200 are held by the promoters, so that only 800 shares are available for trading to the general public. These 800 shares are the so-called 'free-floating' shares.

Similarly, company B has 2,000 shares in total, of which 1,000 are held by the promoters and the rest 1,000 are free-floating.

Now suppose the current market price of stock A is Rs 120. Thus, the 'total' market capitalisation of company A is Rs 120,000 (1,000 x 120), but its free-float market capitalisation is Rs 96,000 (800 x 120).

Similarly, suppose the current market price of stock B is Rs 200. The total market capitalisation of company B will thus be Rs 400,000 (2,000 x 200), but its free-float market cap is only Rs 200,000 (1,000 x 200).

So as of today the market capitalisation of the index (i.e. stocks A and B) is Rs 520,000 (Rs 120,000 + Rs 400,000); while the free-float market capitalisation of the index is Rs 296,000. (Rs 96,000 + Rs 200,000).

The year 1978-79 is considered the base year of the index with a value set to 100. What this means is that suppose at that time the market capitalisation of the stocks that comprised the index then was, say, 60,000 (remember at that time there may have been some other stocks in the index, not A and B, but that does not matter), then we assume that an index market cap of 60,000 is equal to an index-value of 100.

Thus the value of the index today is = 296,000 x 100/60,000 = 493.33

This is how the Sensex is calculated.

The factor 100/60000 is called index divisor.

Source: on





Consider how the crisis has unfolded over the past eighteen months. The proximate cause is to be found in the housing bubble or more exactly in the excesses of the subprime mortgage market. The longer a double-digit rise in house prices lasted, the more lax the lending practices became. In the end, people could borrow 100 percent of inflated house prices with no money down. Insiders referred to subprime loans as ninja loans—no income, no job, no questions asked. - George Soros in latest book

everything’s going up, there’s a feelgood factor and people tell each other how much their houses are going up at dinner parties,” says Professor Mark Stephens of York University’s Centre for Housing Policy. “Then the music stops, as it always does.”

year, Japan was a more attractive market to put money in. If you look at the US, we can now get an internal rate of return of 25% there, so why would anyone want to come to India?” - a senior executive at an international financial services group, who did not wish to be named.

people told us house prices never go down on a national level, and that there had never been a default of an investment-grade-rated mortgage bond, "Mortgage experts were too caught up." - John Paulson, trader, who bet against subprime market and made $15 billion.

most puzzling are the real-estate projects of Parsvnath. Just have a look at the Pride Asia project near Chandigarh. They are asking almost US $300K-$350 K dollars for 2 bed room apartments. They have Villas in this project that costs more than US $1.5 million dollars. It is true that some people in India have that kind of money in India. However most of their wealth is black money and that can not be used to buy these properties. Obviously, these projects have been launched keeping NRIs in mind. - Sanjeev, comment from another site

Desai, aka Bani, the star of Balalji Telefilms's soap, Kasam Se, has been house hunting for over a year. She had almost closed a 2-BHK deal last year for Rs 1.5 crore in a Oberoi Constructions' building located at Andheri, Mumbai, but when she went back to confirm it, she was asked to cough up Rs 2.61 crore. Since then, she is still house hunting. - Mumbai Mirror


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