How many dollars you pay for every dollar the company earns per year.
What this ratio is
The P/E ratio (P/E Ratio) divides the share price by annual earnings: how many years of current earnings do you pay for ownership? A P/E of 20 means twenty years if earnings stay flat. It is the best-known valuation number and the most misused.
What it actually prices
The P/E is the price of expected growth and confidence. A high P/E says the market is buying tomorrow's earnings, not today's. A low one signals doubt about staying power, or maturity without growth. So it means little on its own: a growth sector at 35 can be cheaper in practice than a utility at 14.
The value trap and the enthusiasm trap
A very low P/E is not always a bargain. Sometimes it prices in an earnings collapse that has not reached the denominator yet (the value trap). A very high one needs flawless execution that forgives no single mistake (the enthusiasm trap). The number opens the questions. It does not close them.
Hypothetical example
Two software companies: the first has a P/E of 40 with earnings growing 35% a year, the second 15 with growth of 3%. Over five hypothetical years at a constant pace, the picture flips completely. Growth digests a high P/E, and stagnation makes a cheap stock expensive.
Common mistake
Comparing P/Es across different sectors: margins, growth and capital structure differ sharply. The right comparison is inside the sector and against the company's own history.
Its limits, stated before you use it
The P/E means little for a company losing money (the denominator is negative or zero). It also misleads in cyclical sectors, where it hits its lowest at the top of the cycle, not the bottom, because earnings are at their temporary peak. It ignores debt entirely: two companies with the same P/E, one debt-free and one heavily loaded, are not really priced alike. That is why it is read next to EV/EBIT, which brings debt into the calculation.
Where to see it on the platform
Sector comparisons show it over a rolling window inside each ranked sector, so it is read in the only context that makes sense.
The sector comparisons module shows it next to peer P/Es and the sector average, so it is read in relative terms, not absolute ones.
