Dividend Policy and Share Repurchase
A company with spare cash can pay a dividend or buy back its own shares. In a perfect market, shareholders end up equally rich either way: a dividend lowers the share price, while a buyback keeps the price but shrinks the share count. Taxes, signals, and flexibility are what tip the choice.
What you will learn
- The two main ways to return cash: dividends and share buybacks
- Why the share price falls by the dividend on the ex-dividend date
- Why a fairly priced buyback leaves the share price unchanged
- How to show shareholder wealth is the same either way
- Real-world tie-breakers: taxes, signaling, and flexibility
The formulas
- P_cum
- share price just before the dividend (cum-dividend)
- DPS
- dividend per share
- Share price
- price paid per share in the buyback
Worked example
A firm is worth $1,100,000, including $100,000 of surplus cash, and has 100,000 shares. It can pay the cash as a dividend or use it to buy back shares. Ignore taxes.
- Price now = $1,100,000 ÷ 100,000 = $11.
- Dividend: pays $1 a share; firm value drops to $1,000,000, so price = $10. Each holder has $10 + $1 cash = $11.
- Buyback: $100,000 ÷ $11 ≈ 9,091 shares bought, leaving about 90,909 shares.
- Remaining value $1,000,000 ÷ 90,909 shares = $11 per share.
Answer: Either way, each original share is worth $11 in total: $10 plus $1 cash with the dividend, or an $11 share (or $11 cash for sellers) with the buyback. Shareholder wealth is unchanged.
Common questions
Is a share buyback better than a dividend?
In a perfect market neither is better, because both hand out the same cash and leave total shareholder wealth unchanged. In practice buybacks are more flexible and can be more tax-efficient, while regular dividends signal confidence and are hard to cut without upsetting investors.
What happens to the stock price after a dividend is paid?
On the ex-dividend date the share price normally drops by roughly the dividend amount, because the cash has left the company. A shareholder who had an $11 share now has a $10 share plus $1 of cash, so their wealth is the same before taxes.
Why do companies buy back shares instead of paying dividends?
Buybacks let firms return cash without committing to repeat it every year, give shareholders a choice to sell or not, can be taxed more lightly than dividends, and may signal that management thinks the shares are cheap. They also offset dilution from employee stock options.
What is dividend irrelevance theory?
Proposed by Miller and Modigliani, it says that with no taxes or transaction costs, a firm's dividend policy doesn't affect its value. Investors who want cash can sell some shares, and those who don't can reinvest dividends, so they won't pay more for any particular payout pattern.