PE ratio

The price-to-earnings ratio (P/E ratio) is one of the most widely used tools for valuing a company's stock, telling you how much investors are willing to pay for each unit of the company's yearly profit. In plain terms, it answers the question "how expensive is this share relative to what the business actually earns?" A high P/E often signals that the market expects strong future growth, while a low P/E may point to a bargain, a mature business, or a company facing trouble. Because the ratio depends on both share price and earnings, it shifts constantly as the stock price moves and as new profit figures are reported. Investors rarely judge it in isolation; instead they compare a company's P/E against its own history, its direct competitors, and the average for its industry. It is especially handy for spotting whether a popular stock has become overhyped or whether an overlooked one is quietly undervalued. Keep in mind, though, that the ratio breaks down for firms with little or no profit and can be distorted by one-off accounting events, so it works best as a starting point rather than a final verdict.