The Price-to-Earnings ratio tells you how many dollars investors are willing to pay for each dollar of current annual earnings. A P/E of 20 means investors are paying $20 for every $1 of earnings, implying some combination of growth expectations, quality premium, or sector norms. Growth stocks typically trade at elevated P/E ratios because investors are paying for future earnings that haven't arrived yet, while value stocks in mature industries tend to trade at lower multiples reflecting stable but slow-growing cash flows. The P/E ratio needs context to be meaningful — comparing it to the historical range for that specific stock, to peers in the same sector, and to the current interest rate environment (since high rates reduce the present value of future earnings) is essential. The forward P/E, which uses estimated future earnings rather than trailing actual earnings, is often more relevant for evaluating high-growth companies.
