Financial metric · Per share and valuation
Price-to-Earnings Ratio (P/E)
How many dollars investors are paying for each dollar of annual earnings, or how many years of today's earnings it would take to earn back the price. The most widely used valuation multiple.
How to calculate it
P/E = share price ÷ EPS = market capitalization ÷ net incomeTrailing P/E uses the last 12 months of reported EPS; forward P/E uses analysts' estimates for the next 12 months or fiscal yearEarnings yield = EPS ÷ price (the inverse of P/E)How to read it
- A high P/E means the market expects earnings to grow; a low P/E means it expects slow growth, falling earnings or high risk. P/E reflects expectations, not just cheap or expensive.
- Compare with peers and with the company's own historical range.
- The earnings yield can be compared with Treasury yields to judge how much extra return stocks offer over bonds.
Common pitfalls
- For cyclical companies read it backward: at the top of the cycle, earnings peak and P/E looks lowest, often when the stock is most expensive; at the bottom, P/E looks high when the stock may be cheap.
- GAAP and adjusted P/E can differ a lot. Many quoted P/E ratios use adjusted or 'operating' earnings; know which one you are looking at.
- Loss-making companies have no meaningful P/E. Use price to sales, EV to EBITDA or other measures instead.
- P/E ignores debt. Two companies with the same P/E can carry very different debt; EV to EBIT accounts for it.
Where to find it in a 10-K
Calculate it from the share price and diluted EPS on the income statement (sum the last four quarters for trailing P/E). Forward estimates come from analyst consensus, not from filings.
U.S. vs. China reporting
Chinese investors commonly distinguish static P/E (last fiscal year), TTM P/E and dynamic P/E (forecasts). In the U.S. forward P/E on consensus adjusted EPS dominates market commentary, while GAAP trailing P/E can be much higher for companies with large stock-based compensation or amortization.