The pricetoearnings (P/E) ratio is a measure that compares a companys stock price to its earnings per share (EPS), usually for the previous 12 months. Think of it as a fraction, with the stock price on top and the EPS on the bottom. You can tap the stocks price into your calculator, divide by EPS, and the P/E. The ratio is calculated for you at many online stockresearch sites, ... Read more