'In to-day's commercial world, the Stock-Exchange performs many vital functions which leads the investors towards positive environment.' Explain how by giving any four reasons. 

Stock exchange is an organized market for free purchase and sale of industrial securities. It provides a ready market for the securities.

1. Providing Liquidity and marketability to Existing Securities: The basic function of a stock exchange is the creation of a continuous market where securities are bought and sold. It gives investors the chance to disinvest and reinvest. This provides both liquidity and easy marketability to already existing securities in the market.

2. Pricing of Securities: Share prices on a stock exchange are determined by the forces of demand and supply. A stock exchange is a mechanism of constant valuation through which the prices of securities are determined. Such a valuation provides important instant information to both buyers and sellers in the market.

3. Safety of Transaction: The membership of a stock exchange is well regulated and its dealings are well defined according to the existing legal framework. This ensures that the investing public gets a safe and fair deal on the market.

4. Contributes to Economic Growth: A stock exchange is a market in which existing securities are resold or traded. Through this process of disinvestment and reinvestment savings get channelized into their most productive investment avenues. This leads to capital formation and economic growth.