Price multiple or EV multiple — which should you trust?

You now have two whole families: price multiples (P/E, P/B, P/S) and enterprise-value multiples (EV/EBITDA, EV/Sales, EV/EBIT). They often disagree, and which of them is right depends entirely on the question you were asking.

The core difference in one line

Price multiples value the equity. EV multiples value the whole business. Everything else follows from that. A price multiple asks "what am I paying for the shareholders' slice?" An EV multiple asks "what does the entire operation cost, debt and all?"

When the two diverge — and why

The divergence is almost always about debt. Consider two companies with identical operations:

• Debt-free company: P/E and EV/EBITDA both look middling.
• Heavily indebted company: the debt comes off the equity value in full while it only shaves after-tax interest off earnings, so its P/E can look deceptively low — the market seems to be offering the business cheaply. But its EV/EBITDA, which includes all that debt in the price, reveals it is not cheap at all as a business; the low P/E was leverage playing a trick.

This is the single most useful cross-check in relative valuation. A stock that looks cheap on P/E but ordinary on EV/EBITDA is often a company where debt is doing the flattering. Neither multiple is lying — they're answering different questions.

So which one wins?

It depends on what you're comparing:

• Comparing companies with similar debt levels? Price multiples are quick and fine.
• Comparing companies with different debt levels, or across a whole industry? EV multiples level the field first — reach for them.
• Looking at a bank or insurer? EV multiples break down entirely (debt is their raw material); price multiples like P/E and P/B rule instead.

The practitioner's habit is not to pick one forever, but to look at both and understand the gap between them. The gap is where the information lives.

Try it now

Two companies, the same seven multiples, and one of them a bank.

1. Put the two trailing P/E figures side by side, then the two price-to-book figures. On the first ranking one company looks far cheaper; on the second the ranking is just as stark and no more meaningful. Neither is a verdict.
2. Now try to cross-check the bank with an EV multiple and watch the method fail: its EV/EBITDA reads 0, an empty value rather than a real multiple, because debt is its raw material. For banks and insurers, price multiples rule and EV multiples break down entirely — that is the third bullet of this lesson, made concrete.
3. Do the real version of the exercise on two names from the same industry, one with heavy debt and one without:

Confirm which is which first: enterprise value minus market capitalisation is net debt, positive for a borrower and negative for a company holding more cash than debt. Then compute the ratio of the two trailing P/E figures and the ratio of the two EV/EBITDA figures, and say which gap is wider. Debt alone would narrow the EV gap, because it lifts the borrower's enterprise value; if the EV gap comes out wider anyway, something else is pulling the other way, and depreciation, tax and interest are the three lines to check. 4. Whenever a stock looks "cheap" on P/E, make checking its EV/EBITDA an automatic reflex — that one habit catches most leverage illusions.