How to Evaluate P/E Ratios
Price/earnings (P/E) ratios are a common measure of stock value, both for individual stocks and the overall market. Calculating a P/E ratio is straightforward -- it is simply the price of a single share of stock divided by the company's per share earnings. For example, a stock selling at $50 per share with $2 per share of earnings would have a P/E ratio of 25. However, P/E ratios can be calculated using different earnings numbers. Trailing P/E ratios, which are typically reported in newspapers, use earnings per share for the most recent four quarters, while forward P/E ratios use forecasts of future earnings per share.





