Price-to-Earnings Ratio (P/E)

The Price-to-Earnings Ratio (P/E) is a company's stock price divided by its annual profit per share. It tells you how many dollars investors are willing to pay for every dollar of profit the company makes. You'll see this number everywhere when researching stocks because it's a quick way to judge if a company is expensive or cheap compared to its earnings. A lower P/E might suggest a bargain, while a higher P/E could mean investors expect strong future growth. For example, if Company A trades at a P/E of 15 and Company B at 30, Company A looks cheaper on paper—but Company B might be pricier because investors believe it'll grow faster. Context matters: compare P/E ratios within the same industry for the most useful comparison.