Last lesson we read a balance sheet: what a company owns, what it owes, and who funds the growth. This one is about the number everyone quotes and almost nobody defines. The multiple.
A multiple is a sentence, not a score
When someone says a stock trades at 25 times earnings, they have said something very simple: the price is 25 times what the company earned in a year. Divide the price per share by the earnings per share and you have it. Flip it upside down and it becomes more honest: 1 divided by 25 is 4%, so at this price the business is handing you 4 cents of profit for every dollar you put in, this year.
That is all a multiple is. A compressed sentence about price relative to something the business produces.
The mistake beginners make is treating it as a grade. Twelve times is cheap, forty times is expensive, buy the first and avoid the second. That is not how it works, and the reason is in the sentence itself: the multiple only tells you the price. It says nothing about what you are buying.
Why a low multiple is not a discount and a high one is not a mistake
Two companies both earn $100M this year. One is a business whose earnings will be $100M again in five years. The other will earn $400M. If both traded at the same multiple, the market would be saying growth is worth nothing, which it plainly is not.
So a high multiple usually means one of three things: the market expects earnings to grow, it thinks those earnings are durable and safe, or it is wrong. A low multiple means the market expects earnings to shrink, it thinks they are fragile, or it is wrong. Your job as an allocator is not to prefer low numbers. It is to work out which of the three explanations is operating, and whether you disagree.
That is the whole discipline. The multiple frames the question. It does not answer it.
The main varieties, and what each one hides
Price to earnings. The most quoted, and the most easily manipulated, because "earnings" is an accounting figure with a lot of judgment in it. Companies report both a statutory number and an "adjusted" number that excludes things management considers unrepresentative. Adjusted earnings can be reasonable. They can also be where the inconvenient costs go to hide. Always ask which earnings the multiple is built on.
Trailing versus forward. A trailing multiple uses the last twelve months, which actually happened. A forward multiple uses next year's estimate, which has not. Forward multiples always look cheaper, because analysts assume growth. When a headline says a stock trades at 18 times against a market at 25, check whether you are comparing a real number to an imaginary one.
Enterprise value to EBITDA. Price to earnings looks at what shareholders own. Enterprise value adds the debt and subtracts the cash, so it asks what the whole business costs, including the borrowing. This matters enormously when a company is leveraged, because two firms with identical operations and different debt loads will look very different on P/E and nearly identical on EV multiples. If you are comparing a debt-funded company to a self-funded one, this is the fairer comparison.
Price to sales, price to book. Used when profits do not exist yet or when profits are not the right measure of the asset, as in banks. They are blunter tools, and blunter tools invite lazier arguments.
The number an allocator should actually care about
Ask what the multiple assumes, then ask whether it is achievable.
If a business trades at 40 times earnings and its peers trade at 20, the price is embedding a specific belief: this company will grow faster, or hold its margins longer, or face less risk. Write that belief down as a sentence. Then test it against what you know about the business. That is a far more useful exercise than deciding 40 is a large number.
The same logic runs in reverse. A stock at 8 times earnings is not a bargain, it is a warning that the market expects something bad. Sometimes the market is wrong and that is where returns come from. But you should be able to say what the market believes and why you think it is mistaken. If you cannot, you are not buying cheap, you are buying blind.
Why the target price on your screen is not a valuation
Analysts publish price targets and the financial press reports them as though they were measurements. They are outputs of a model, and the model contains assumptions the analyst chose. This week gave a clean example of the range: one firm doubled its target on a large semiconductor company from $625 to $1,250, based on a model projecting $147B of revenue from one product line by 2030 on an assumed 15% share of a market that does not exist yet (24/7 Wall St.).
That is not a criticism of the analyst. Everyone forecasting anything four years out is doing this. It is a point about what you are reading. The number is downstream of an assumption about market size and market share. Change the share assumption from 15% to 8% and the target roughly halves without a single fact changing. When you see a price target, look for the assumption doing the work, because that is the actual claim.
What this looks like in practice
You do not need a spreadsheet to start. You need three habits.
First, whenever you see a multiple, say the sentence out loud. "I am paying 30 times what this company earned last year." It reintroduces the sense of scale that the shorthand removes.
Second, always ask "compared to what". A multiple in isolation is meaningless. Compared to the company's own history, to its direct competitors, to the market as a whole, it starts to mean something. Different industries live at permanently different levels, and comparing a software company to a utility teaches you nothing.
Third, write down the belief the price implies before you buy, in one line. That line becomes the thing you check later. If the belief was "margins hold above 40%" and margins fall to 30%, you have an answer rather than a feeling.
Where this fits in ABC
For the Beta sleeve, this lesson is mostly informational. You are buying the whole market at whatever multiple it happens to trade at, and you are doing that deliberately, because the alternative is trying to time it. Knowing that the index is expensive is useful context for your expectations of future returns. It is not a reason to stop contributing.
For the Alpha sleeve, this is the entry fee. If you are buying an individual company rather than the market, the only reason to do so is that you believe something specific the price does not. A multiple is how you find out what the price already believes. Skipping this step means you are betting without knowing the odds.
For the Cash sleeve, valuation is how you decide when dry powder becomes worth deploying. Pre-committing to what "cheap enough" means, in multiple terms, before the market falls is the discipline that makes a cash sleeve useful rather than just idle.
Takeaway: a multiple tells you what the market believes, not whether the market is right. Learn to read the sentence hidden inside the number, then decide whether you disagree. Low is not cheap and high is not expensive until you know what is being bought.
Analytics & education, not advice. DYOR.