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ExplainersIntermediate· 7 min read

How share buybacks work

The one thing to remember

A buyback is only good if the shares were bought below what they are worth. Companies are famously bad at judging this.

The question

Judge whether a buyback created value or destroyed it.

Figure

How share buybacks work works, in one picture

1The mechanics: fewer slices, same pie2It is a dividend in disguise3Whether it works depends entirely on the price paid4And check whether it is even real

The same argument as the text, as a chain. Each step is what makes the next one possible.

Figure

What you actually own

Founders50%
Institutions30%
Other investors15%
You5%

A share is a slice of the whole company: its profits, its assets and its votes. Your slice is small, and it is a real claim, not a bet on a ticker.

  1. 1

    The mechanics: fewer slices, same pie

    The company buys its own shares and cancels them. Total profit is unchanged, but it is now divided among fewer shares, so earnings per share rise. Each remaining share owns more of the business.

  2. 2

    It is a dividend in disguise

    It returns cash to shareholders, but instead of sending it to everyone, it concentrates ownership among those who stay. In many jurisdictions that is more tax-efficient than a dividend, which is much of why it became so popular.

  3. 3

    Whether it works depends entirely on the price paid

    Buying back shares below intrinsic value transfers wealth to continuing shareholders. Buying above it destroys wealth. It is exactly like any other investment decision, and the company is buying an asset it is not remotely objective about.

    Companies buy back most aggressively when cash is plentiful and confidence is high, which is to say near the top. The record here is genuinely poor.

  4. 4

    And check whether it is even real

    Many companies buy back shares with one hand while issuing new ones to staff with the other. The headline buyback is enormous, the share count does not fall, and the entire exercise was a way to pay employees in stock without you noticing.

Try it
What a P/E is actually sayingInteractive
P/E ratio
20.0
Years of earnings you pay
20 yrs
Payback allowing for growth
12 yrs

Ordinary. The market expects steady, unremarkable growth.

The P/E is years of today's earnings you are paying. Growth shortens the payback, which is why fast growers deserve higher multiples.
You have got it when

You check the share count over five years, not the buyback announcement.

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The bottom line

A buyback is only good if the shares were bought below what they are worth. Companies are famously bad at judging this.

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Every one shows its exact method, and the circumstances in which it is wrong. Free, and no account to look.