
The price-to-earnings (P/E) ratio is one of the widely used and accepted metrics for stock valuation. It is generally assumed that stocks with high P/E are overvalued, whereas low P/E stocks are undervalued. However, like many other financial metrics, the P/E ratio also has some limitations. Since this ratio is calculated based on the current price of the stock over its last one year of earnings, it does not take into consideration the company's future growth rate, which is a major drawback of this metric. Given this drawback, legendary investor Peter Lynch popularised the price-earnings-to-growth (PEG) ratio and mentioned this in his famous book One Up On





