how is the behavior about points in stock market, Why points fall or up?

Answer 1

Lots of different kind of points . . .
Which ones are you asking about ?
Or are you asking about the stock prices and DOW Jones averages ?
Those are actual $$$ prices for shares of stock or in the case of the DOW , the price for the 30 plus stocks used for the average. . .

Dow Jones Industrial Average
The best known U.S. index of stocks. A price-weighted average of 30 actively traded blue-chip stocks, primarily industrials including, stocks that trade on the New York Stock Exchange. The Dow, as it is called, is a barometer of how shares of the largest U.S. companies are performing. There are hundreds of investment indexes around the world for stocks, bonds, currencies, and commodities.

For more on the market and investing check out the Yahoo finance investing education links (about 1/2 way down on the left )

http://finance.yahoo.com/

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