What Is a Share Buyback?
A share buyback is when a company uses its own cash to buy its own shares from investors. The repurchased shares are cancelled or set aside, so fewer remain in existence, and each remaining share represents a slightly larger slice of the same business. It is one of the two main ways a company returns cash to shareholders. The other is the dividend.
Buybacks are also called share repurchases. Whether one is good for shareholders depends almost entirely on the price paid and where the money came from.
How a buyback works
The board approves a sum of money to spend on repurchases. The company then buys its shares, usually on the open market over months or years. Less often it makes a tender offer: a public offer to buy a set number of shares at a stated price.
The shares are then either cancelled or held as treasury shares, which carry no vote and receive no dividend. Either way, they stop counting.
How a buyback is measured
The most direct measure is the change in the number of shares over a period. Take the share count at the start, subtract the count at the end, and divide by the count at the start.
Net buyback rate = (Shares at start − Shares at end) ÷ Shares at start
A second measure, buyback yield, compares the money spent with the market value of the whole company:
Buyback yield = Cash spent on repurchases ÷ Market value of the company
A worked example
The numbers below are invented, chosen to be easy to follow.
Net income for the year: $500 million
Shares at the start of the year: 100 million, so earnings per share (EPS) is $5.00
Shares repurchased: 5 million, leaving 95 million
Net buyback rate = 5 million ÷ 100 million = 5%.
If profit stays at $500 million, EPS becomes $500 million ÷ 95 million = $5.26. That is a rise of about 5.3% with no change in the business itself.
An investor holding 1,000 shares owned 0.00100% of the company before and about 0.00105% after, without buying anything.
What a good buyback looks like
As rough orientation, look at what the share count is doing:
Falling 1% to 3% a year, steadily: meaningful over time. A 2% reduction every year shrinks the share count by about 18% over ten years.
Falling more than 5% a year: aggressive. Worth checking how it is being paid for.
Flat, despite large sums spent: the repurchases are only offsetting new shares handed to employees as pay.
Rising: the company is issuing more shares than it buys. Each existing share becomes a smaller slice of the business, which is called dilution.
The share count is half the test. The other half is price. Warren Buffett has set out two conditions for a sensible buyback: the company keeps enough cash for the needs of the business, and the shares trade below a conservative estimate of what they are worth. Buying back shares at a discount moves value toward the shareholders who stay. Buying them back above their value moves it toward the ones who sell.
What counts as normal also depends on the sector. Mature businesses that produce more cash than they can usefully reinvest buy back the most. Young companies and those that need a lot of capital tend to issue shares instead. Real estate investment trusts and utilities routinely issue shares to pay for new assets, so a rising count there is not automatically a warning. Banks can only repurchase as much as regulators' capital rules allow.
What a buyback doesn't tell you
An announcement is not a purchase. An approved programme is permission, not an obligation. A company can spend a fraction of the headline figure, or nothing. The share count is the evidence.
It doesn't tell you the price was sensible. Companies tend to buy the most when profits are high and their shares are expensive, and to stop in downturns when their shares are cheap. That is the reverse of what helps shareholders.
Rising EPS is not the same as a growing business. A buyback lifts earnings per share even when total profit is flat. Compare EPS growth with net income growth. If only the first is rising, the business isn't growing. The share count is shrinking.
It doesn't show where the money came from. Repurchases paid for with borrowed money leave the company with more debt and less room for a bad year.
It can hide dilution. A company can spend billions on buybacks and end with the same number of shares if it issues just as many to its staff. The spending is real. The benefit to shareholders is not.
It doesn't show what was given up. Cash spent on repurchases is cash not spent on research, new capacity or paying down debt. Whether that was a good trade depends on what the alternatives were.
It can serve management more than owners. Where executive bonuses depend on EPS targets, a buyback helps hit the target. That doesn't make every buyback suspect, but it is a reason to look at the incentives.
How to actually use it
Start with the share count over five to ten years, not with the latest announcement. Each company page in the SIA company library shows share buybacks under Past Results, next to the five-year and ten-year returns, so you can read them against the long-run record.
Then check how the buybacks are funded. Add dividends and repurchases together and compare the total with free cash flow, which is the cash a business generates from its operations minus what it spends on equipment and other long-lived assets. If the total regularly exceeds free cash flow, the gap is being filled with debt or savings.
Next, compare EPS growth with net income growth to see how much of the per-share progress came from the business and how much from the shrinking share count.
Then look at when the company bought. Were the heavy repurchase years the ones when its shares were cheap relative to earnings, or the ones when they were expensive?
Finally, add the buyback yield to the dividend yield. The combined figure is sometimes called shareholder yield, and it gives a fuller picture of the cash being returned than the dividend alone. A company with a small dividend may still be returning plenty.
None of this turns a buyback into a signal on its own. It is one piece of how a company handles its cash.
Common questions
Are buybacks better than dividends?
Neither is better in general. A dividend puts cash in every shareholder's hands and is usually taxed when it is received. A buyback leaves the choice to each shareholder and, in many tax systems, delays tax for those who don't sell, though the rules differ by country. A dividend is a firmer commitment. A buyback is easier to pause.
Does a buyback make the share price go up?
Not automatically. The company is worth less by the amount of cash it spent, and there are fewer shares to divide the rest between. Value per share rises only if the shares were bought for less than they were worth.
What is share dilution?
The opposite of a buyback. When a company issues new shares, each existing share becomes a smaller slice of the business and of its profit.
The short version
A share buyback reduces the number of shares, so each one that remains owns more of the business. Done with spare cash at a sensible price, it rewards the shareholders who stay. Done at high prices, with borrowed money, or only to offset shares issued as pay, it does much less than the headline figure suggests. The share count over many years tells you which kind you are looking at.
This article is educational and is not investment advice, and nothing in it is a recommendation to buy or sell any security. Avia Artis is not authorised or regulated by Finanstilsynet and is not registered with the SEC as an investment adviser or broker-dealer.
