Stock information providing method and system for displaying firm's life stage and determining the overvaluation/undervaluation of a stock

PURPOSE: A stock information providing method capable of displaying the corporate growth stage and calculating undervalued/overvalued stocks based on the corporate growth stage and a system thereof are provided to preferentially sell overvalued stocks and buy undervalued stocks, thereby maximizing the investment profits. CONSTITUTION: A current value index calculating unit(120) calculates a current value index of a corporate using data of a stock index database(110). A normal value index calculating unit(130) calculates a normal value index of the corporate using the data of the stock index database A future value index calculating unit(140) calculates a future value index of the corporate. A stock information providing system establishes a corporate growth stage by comparing the current value index, the normal value index, and the future value index.