What Is a Stock Buyback? Is It Good for Shareholders?

Stock buybacks are one of those topics that generate a lot of heat but very little light. Companies love them. Some investors swear by them. Critics—including Warren Buffett, who doesn’t hand out criticism lightly—have called them a form of financial engineering that benefits executives at the expense of long-term investment and workers. The truth, as usual, is messier than either side wants to admit.

What buybacks actually do, and whether they serve shareholders well, depends entirely on how the buyback is executed, what alternatives were available, and who exactly benefits. There’s no universal answer here, despite what passionate people on both sides will tell you.

What Is a Stock Buyback?

A stock buyback happens when a company purchases its own shares on the open market or directly from shareholders, reducing the number of outstanding shares in circulation. When a company buys back stock, it spends cash to acquire shares that then get retired or held as treasury stock. This reduces the denominator in the earnings-per-share calculation, which mechanically increases EPS even if operating earnings remain flat.

Here’s why this matters: companies aren’t required to buy back shares at any particular time or in any particular amount, which gives management enormous discretion. This flexibility is exactly what makes buybacks so controversial—executives can time purchases to boost EPS precisely when they need to hit performance targets, rather than when the stock is actually undervalued.

The practice took off after the Tax Reform Act of 1986 eliminated the preferential tax treatment of dividends relative to capital gains. Before that law changed, dividends were the primary way companies returned cash to shareholders. Afterward, buybacks became the preferred tool, and they’ve remained so ever since. In 2023 alone, S&P 500 companies spent approximately $800 billion on share repurchases, according to S&P Dow Jones Indices. That’s roughly the entire GDP of a medium-sized country in one year, gone—just buying back shares.

How Do Stock Buybacks Work?

Companies execute buybacks through a few different methods, and understanding the difference matters for investors.

The most common is the open market repurchase, where a company instructs a broker to buy shares on the open market over a specified period, typically months or years. This method is flexible—companies can pause or stop purchases at any time—but it carries the risk of pushing up the stock price as the company buys, effectively paying more for each subsequent share. Open market repurchases account for roughly 90% of all buyback activity.

The second method is a tender offer, where the company publicly offers to buy a specific number of shares at a premium to the current market price, usually within a narrow timeframe. Tender offers are faster and more certain in terms of quantity, but they’re more expensive because of the premium paid, and they signal to the market that the company is aggressively acquiring shares.

A third mechanism, less common but worth knowing about, is an accelerated share repurchase (ASR), where a company contracts with an investment bank to immediately retire a large block of shares while the bank hedges its exposure in the market. ASRs are essentially a faster, more concentrated version of a tender offer, often used when companies want to execute a large buyback quickly.

One detail that most articles skip over: companies often finance buybacks with debt. This is particularly true now, where the cheap debt from the post-2008 era has been replaced by far more expensive borrowing. When a company issues new bonds to fund a buyback, it’s swapping equity for debt on the balance sheet—a maneuver that can improve certain financial ratios while increasing financial risk.

Why Do Companies Conduct Buybacks?

Management teams offer several justifications for buybacks, and some of them are legitimate. The problem is that the justifications are often applied selectively, which is where the criticism becomes earned.

The most commonly cited reason is returning excess cash to shareholders. When a company generates more cash than it can productively reinvest in the business, returning that cash makes sense. The question that rarely gets asked: was the cash truly excess, or was it excess because management chose not to invest in growth opportunities that would have created more long-term value?

The second reason is EPS boost, which I’ve already mentioned. By reducing shares outstanding, a company can grow EPS without any actual improvement in business performance. This matters because EPS is one of the primary metrics Wall Street uses to evaluate companies, and executive compensation is often tied to EPS targets. Critics argue that this creates a perverse incentive where executives prioritize buybacks to hit short-term numbers rather than investing in the business. Buffett has been notably vocal about this.

The third reason is tax efficiency. In the United States, capital gains from share appreciation are taxed at lower rates than dividend income, and shareholders can choose when to realize those gains by timing their sales. For shareholders who don’t need immediate cash flow, a buyback can be more tax-efficient than a dividend. This is a legitimate advantage, though it’s worth noting that it primarily benefits wealthy shareholders in taxable accounts.

Finally, companies argue that buybacks provide price support during market downturns. When a company buys its own shares, it’s effectively placing a floor under the price. This is true in the narrow mechanical sense, but it’s also been used to justify buying back shares at cycle highs—which is exactly the opposite of what a rational capital allocator should do.

Are Stock Buybacks Good for Shareholders?

Sometimes yes, sometimes no. The impact of a buyback depends entirely on the price paid, the alternatives available, and whether management is acting in shareholders’ interest or their own.

When a company buys back shares at a discount to intrinsic value, remaining shareholders benefit. The company is essentially buying an asset for less than it’s worth, which concentrates more value in each remaining share. This is the textbook case for buybacks, and it does happen—though far less often than companies suggest.

When a company buys back shares at a premium to intrinsic value, remaining shareholders lose. The company is destroying value by paying too much for an asset that’s worth less than the price paid. This is far more common than Wall Street admits, particularly when buybacks are timed to coincide with periods of high executive stock sales.

My honest assessment: buybacks, on average, have destroyed far more value than they’ve created over the past two decades. A study by economist William Lazonick and colleagues found that between 2005 and 2015, the 500 largest U.S. companies spent $4 trillion on buybacks—often financed by debt—while investing less in productive capacity and research than their international competitors. This isn’t controversial in academic circles; it’s documented in SEC filings and Federal Reserve data.

That said, context matters enormously. A company like Apple, sitting on tens of billions in cash with limited high-return investment opportunities, returning capital via buybacks makes sense. A company borrowing money to buy back shares while laying off workers and underfunding pensions does not.

Potential Benefits

The case for buybacks isn’t merely theoretical—there are genuine situations where they create real value.

Flexibility is the primary advantage over dividends. Companies can adjust buyback programs up or down based on cash flow and market conditions, whereas dividends create expectations that are difficult to reverse without sending a negative signal. This flexibility is valuable during economic downturns when preserving cash matters.

Tax efficiency remains meaningful for certain shareholders. A retiree living off a taxable portfolio might prefer dividends for the steady cash flow, but an institutional investor or wealthy individual in a high tax bracket might significantly prefer buybacks. The difference in after-tax returns can be substantial.

Share price support does provide real benefits in certain scenarios. When a company’s stock is genuinely undervalued and management has exhausted other uses for cash, a well-timed buyback can signal confidence and provide a floor that prevents a speculative collapse. This only works, however, when the buyback is executed at prices below intrinsic value.

EPS growth can translate to genuine shareholder returns if the buyback is paired with a rising stock price. When shares appreciate because the business is growing, the EPS boost from buybacks compounds that growth. The problem isn’t the EPS boost itself—it’s when the EPS boost substitutes for actual business growth.

Potential Drawbacks

The criticisms of buybacks aren’t left-wing propaganda or sour grapes from investors who missed out. They’re rooted in observable data about how companies actually behave.

Opportunity cost is the most serious criticism. Every dollar spent on a buyback is a dollar not invested in the business. When companies borrow to fund buybacks while claiming they have no growth opportunities, something doesn’t add up. The empirical evidence is troubling: companies that aggressively repurchase shares tend to underperform those that invest in R&D and capital expenditures, particularly in technology and healthcare sectors.

Executive incentives are fundamentally misaligned. When CEO pay is heavily weighted toward EPS targets and stock price performance, and when executives can time buybacks to maximize their own compensation while minimizing shareholder impact, the outcome is predictable. Research from the SEC’s Division of Economic and Risk Analysis found that executives significantly increased their stock sales in windows immediately following buyback announcements—a pattern that’s difficult to explain if buybacks were purely about shareholder value.

Market timing is notoriously difficult to get right, and companies consistently get it wrong. They tend to buy back shares when stock prices are high—often when business is good and cash is plentiful—and stop buying when prices are low—when the stock would be a better value. This is precisely backwards from what a rational capital allocator would do, and it costs shareholders billions annually.

Debt accumulation has accelerated dramatically. Since 2010, non-financial corporations have added over $3 trillion in debt, much of it specifically to fund share repurchases. When interest rates were near zero, this was manageable. With rates at multi-year highs, the debt service burden is becoming problematic for companies that overleveraged.

Stock Buybacks vs. Dividends

The comparison isn’t as simple as financial media makes it seem. Both are mechanisms for returning capital to shareholders, but they work differently.

Buybacks offer flexibility—companies can adjust or pause them—while dividends are hard to cut without signaling distress. Tax treatment differs significantly: buybacks generate capital gains (deferred until the shareholder sells), while dividends trigger ordinary income tax immediately. Dividends send a stronger cash flow signal because they demonstrate actual cash generation, whereas buybacks can be misinterpreted by the market. With buybacks, management decides timing; with dividends, shareholders control whether to reinvest through DRIPs or spend the cash. On market impact, buybacks can push the price up while dividends are neutral.

Most companies should probably pay more dividends and do fewer buybacks. Dividends are harder to fake, they force management to demonstrate actual cash generation, and they can’t be easily manipulated for short-term stock price management. When a company pays a sustainable dividend, it’s making a credible commitment to return cash regardless of short-term conditions.

That said, buybacks serve a purpose for companies with genuinely unpredictable cash flows or for shareholders who want flexibility in how they realize returns. The solution isn’t to eliminate buybacks—it’s to be far more skeptical about how and when they’re executed.

Recent Examples of Stock Buybacks

The scale of modern buybacks is hard to overstate. Apple has repurchased approximately $640 billion in shares since 2012, more than the market capitalization of most S&P 500 companies. Microsoft has spent over $200 billion on buybacks in the past five years alone. These aren’t exceptional cases—they represent the norm among large-cap tech companies with dominant market positions and limited competitive threats.

The pattern is consistent: companies with strong cash flows, minimal growth investment opportunities, and management compensation heavily weighted toward stock performance tend to be the most aggressive repurchasers. Whether this creates value depends entirely on whether the shares were cheap or expensive when purchased.

What has changed in recent years is the financing. During the 2010s, companies could borrow essentially for free, making debt-funded buybacks a no-brainer even at elevated valuations. That’s no longer true. As of early 2025, investment-grade borrowing costs have doubled or tripled compared to the 2010s, and companies that loaded up on debt for buybacks are now facing difficult choices about capital allocation. Several high-profile companies have slashed buyback programs not because their stock became less attractive, but because the debt burden became unsustainable.

This is the point that buyback proponents consistently miss: the economic conditions that made buybacks so attractive are reversing, and companies that didn’t exercise restraint when borrowing was cheap are now paying the price.

Conclusion

There’s no universal answer to whether stock buybacks are good for shareholders. What matters is the price paid, the alternatives foregone, and whether management is acting in shareholders’ interest or their own.

The evidence suggests that buybacks, on average, have destroyed more value than they’ve created—not because the mechanism is inherently flawed, but because the incentives around execution are badly misaligned. Executives benefit from EPS growth and stock price appreciation regardless of whether the buyback creates value, so they execute buybacks at the wrong times and in the wrong amounts. Shareholders bear the cost.

That doesn’t mean you should root against buybacks when you own a company that executes them intelligently. It means you should be skeptical, ask hard questions about valuation, and hold management accountable when buybacks coincide with executive stock sales or debt accumulation. The default assumption should be skepticism, not enthusiasm—and the burden of proof is on management to demonstrate that each buyback creates genuine value rather than just appearing to do so.