Glossary
Share buyback
A company repurchasing its own shares from the market, reducing the share count and returning cash to shareholders.
A share buyback, or repurchase, is when a company uses its cash to buy its own shares, typically on the open market. The repurchased shares are retired or held as treasury stock, so fewer shares remain outstanding and each remaining share represents a slightly larger slice of the company. Buybacks have become the largest way US companies return cash to shareholders, so understanding them helps you read earnings per share and cash flow.
How it works
The board first authorizes a program, for example "up to $10 billion," with no obligation to complete it. The company then buys over months or years, usually within the conditions of the SEC's Rule 10b-18 safe harbor, which limits timing, price and daily volume. Since 2023, US public companies have paid a 1% federal excise tax on the net value of shares they repurchase in a year.
Reading a buyback critically
- Net versus gross. Many companies issue large amounts of stock to employees. A buyback that merely offsets that dilution does not shrink the share count.
- Price paid. Repurchases add value for remaining holders only if the shares are bought below their intrinsic value; buying at inflated prices destroys value.
- Funding. Buybacks paid for with borrowed money raise leverage.
- Flexibility. Unlike dividends, buybacks can be paused quietly, so they signal less commitment.
Compared with dividends, buybacks let shareholders who do not sell defer taxes, since their gain is only taxed when they eventually sell.