Understanding Stock Splits and Share Buybacks: Why Public Companies Do Them

How a stock split works

In a forward split, each existing share becomes several shares. In a 2-for-1 split, a shareholder with 100 shares at 200 dollars ends up with 200 shares at about 100 dollars. The total value of the holding and the company's market capitalization stay the same; only the number of shares and the price per share change.

Well-known examples include Apple's 4-for-1 split in August 2020 and Nvidia's 10-for-1 split in June 2024. Both followed large increases in their share prices.

Why companies split shares

Companies split shares mainly to keep the price per share accessible. A lower price can make it easier for small investors to buy whole shares, improve trading liquidity and, for price-weighted indices such as the Dow Jones Industrial Average, affect index eligibility and weighting.

Fractional share trading, now offered by many brokers, has reduced the practical importance of share price for individual investors. Splits remain popular, partly because they signal management's confidence after strong performance. Studies have found that share prices sometimes rise around split announcements, though the split itself creates no economic value.

Reverse splits

A reverse split combines shares. In a 1-for-10 reverse split, ten shares become one, and the price per share rises tenfold. Companies usually conduct reverse splits to meet minimum price requirements for exchange listing or to escape the stigma of a very low share price.

Reverse splits often occur at struggling companies, and they do not address underlying business problems. Investors should examine why the share price fell so far in the first place.

How share buybacks work

In a buyback, a company repurchases its own shares, usually on the open market over time, sometimes through tender offers or accelerated share repurchase agreements with banks. Repurchased shares are typically held as treasury stock or retired.

In the United States, open-market buybacks commonly follow the conditions of SEC Rule 10b-18, which provides a safe harbor from manipulation claims when companies respect limits on timing, price and volume. Since 2023, US public companies have paid a 1 percent excise tax on the net value of shares they repurchase, introduced by the Inflation Reduction Act.

The effect on earnings per share

Buybacks reduce the number of shares outstanding, so the same net income is divided among fewer shares. If a company earns 100 million dollars with 100 million shares outstanding, earnings per share are 1 dollar. If it repurchases 5 million shares, earnings per share rise to about 1.05 dollars even if profits are unchanged.

That increase is mechanical and does not by itself create value. Whether a buyback benefits remaining shareholders depends on the price paid: repurchasing shares below their intrinsic value transfers value to continuing holders, while overpaying destroys it.

Buybacks versus dividends

Both return cash to shareholders, with differences summarized below. Many companies use both.

• Flexibility: buybacks can be scaled up or down without the expectation of continuity attached to regular dividends.
• Taxes: dividends are taxed when received, while buybacks raise the value of remaining shares, with tax deferred until shares are sold.
• Choice: shareholders who want cash can sell some shares, while others can keep their stake.
• Signaling: consistent dividends signal stable cash flows; buybacks can signal that management sees shares as undervalued.

Reading a buyback announcement

Headlines often report that a company has authorized a buyback worth billions of dollars. An authorization sets a ceiling on spending, and some companies complete only part of their announced programs. Execution is what matters.

US companies disclose actual repurchases in their quarterly reports, including the number of shares bought each month and the average price paid. Comparing that price with the stock's valuation at the time, and checking the change in diluted share count over several years, shows whether management has bought shares wisely and whether the program actually reduced the share base.

Funding deserves attention too. Buybacks paid for from free cash flow are generally healthier than those financed with new debt, which increases leverage and leaves less room for difficult years.

Criticisms of buybacks

Critics argue that some companies prioritize buybacks over investment in their businesses or employees, or borrow heavily to fund repurchases. Others note that executive pay tied to earnings per share can create incentives to repurchase shares regardless of price.

Buybacks can also offset dilution from stock-based compensation without actually reducing the share count. Checking whether shares outstanding actually decline over time shows whether a buyback program is shrinking the share base.

How investors should evaluate them

Splits change the packaging of ownership without changing its value, so they should not drive investment decisions. Buybacks deserve closer attention: look at the price paid relative to value, how they are funded, whether the share count falls and what alternative uses of cash were available.

Capital allocation decisions reveal management's priorities and discipline, and over long periods they often matter as much as the operating performance of the business itself. This guide is educational and not investment advice.