The stock exchange provides a market place for the purchase and sale of securities. The origin of stock market goes back to the time when securities representing the property of promise to pay were first issued and may transferable from one person to another. Stock prices change everyday by market forces. By this we mean that share prices change because of supply and demand. If more people want to buy a stock (demand) than sell it (supply), then the price moves up. Conversely, if more people

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... ted to sell a stock than buy it, there would be greater supply than demand, and the price would fall.