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For most hands-off, long-term investors, a low-cost S&P 500 index fund is the clearer default. It spreads your money across hundreds of large U.S. companies and, in the case of Vanguard S&P 500 ETF (VOO), reported 2025 expenses of just $3 per $10,000 invested (0.03% annually). Berkshire Hathaway can be a sensible alternative for someone who intentionally wants one-company exposure, trusts its capital-allocation culture, and accepts management, succession and concentration risk.
Berkshire’s historical record is remarkable: its 2025 shareholder letter reports a 19.7% compounded annual gain from 1965 through 2025, versus 10.5% for the S&P 500 over the same period. Those figures describe the past, not a 20-year forecast. The right choice depends on whether you value broad, rules-based exposure and simplicity or are willing to depend on one company’s businesses, investments and future leaders.
What you are actually buying
Berkshire Hathaway is one company with many businesses
Buying Berkshire Hathaway stock means becoming an owner of a single corporate issuer. Berkshire owns operating subsidiaries, insurance activities, equity investments and large cash and fixed-income holdings. That breadth can make the company look diversified when viewed by business line, but every result still flows through Berkshire’s balance sheet, accounting, capital-allocation choices and governance.
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Your return depends on several decisions made at the corporate level: how insurance risk is priced, where excess cash is invested, which businesses are acquired, how much capital is retained and how future leaders allocate resources. A mistake, regulatory event or unfavorable succession decision can affect the entire holding at once. You also bear the market’s changing valuation of Berkshire shares.
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An S&P 500 index fund is a portfolio vehicle
An S&P 500 fund owns shares intended to track the S&P 500, a benchmark of large U.S. companies. VOO is one example; Vanguard describes it as an exchange-traded share class of Vanguard 500 Index Fund. The fund structure means you own a slice of many issuers rather than relying on the operating results of one parent company.
Index construction determines which companies enter, leave or change weight in the benchmark. That rules-based process reduces the need for you to judge a chief executive, acquisition or succession plan. It does not eliminate risk: the fund remains concentrated in U.S. large-cap stocks, and its value can fall sharply during bear markets or broad equity sell-offs.
Diversification: broad exposure versus company-level concentration
The central difference is not simply the number of businesses associated with each investment. Berkshire may own dozens of subsidiaries and investments, but you still hold one issuer. An S&P 500 fund spreads company-specific risk across a large-cap index, while retaining meaningful exposure to the U.S. stock market as a whole.
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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware match| Question | Berkshire Hathaway | S&P 500 index fund |
|---|---|---|
| What is the legal exposure? | One corporate issuer whose subsidiaries, investments and cash are consolidated into Berkshire’s results. | A fund holding shares of the companies represented in the S&P 500 benchmark. |
| What can hurt the holding? | Insurance losses, operating-business weakness, investment losses, valuation changes, capital-allocation errors or succession decisions. | Broad U.S. equity declines, large-cap sector weakness, index methodology changes and fund-tracking costs. |
| Can company-specific risk be diversified away? | No. Internal diversification helps, but a Berkshire-specific shock affects the single holding. | To a greater extent. A problem at one constituent usually has a limited effect on the whole fund, although the portfolio can still decline together. |
| Geographic and size scope | Determined by Berkshire’s businesses and investments; not a preset market index. | Large-cap U.S. stocks; it is not a complete global or all-company portfolio. |
Calling the index fund diversified should therefore be understood narrowly. It diversifies across large U.S. companies, not across every asset class, country or economic outcome. If you need international stocks, bonds, cash or other assets, those require additional holdings or a broader allocation.
What the 1965–2025 record says—and does not say
Berkshire’s 2025 shareholder letter reports a 19.7% compounded annual gain for Berkshire Hathaway from 1965 through 2025, compared with 10.5% for the S&P 500 over the same span. A six-decade compounding record is important evidence of what Berkshire achieved under the leadership and circumstances of that period.
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| Measure | Berkshire Hathaway | S&P 500 |
|---|---|---|
| Compounded annual gain, 1965–2025 | 19.7%, as reported in Berkshire Hathaway’s 2025 shareholder letter | 10.5%, as reported in the same Berkshire comparison table |
| What the figure represents | Historical compound performance over the stated period | Historical compound performance over the stated period |
| Use as a forecast | Not a guarantee of future returns | Not a guarantee of future returns |
The comparison is historical, not an apples-to-apples promise about the next 20 years. Berkshire’s business mix, its capital base, market size, interest rates, tax rules, competitive conditions and leadership are different today than in 1965. The S&P 500 itself changes constituents and weights over time. A past performance gap cannot establish that Berkshire will continue to outperform, nor that the index will deliver its historical average.
There is also no single number in the supplied record that establishes a consistently defined volatility, drawdown, valuation or tax advantage for one choice. You should not infer those properties from the compound-return figures alone. Two investments can have the same long-run return while producing very different paths, years of underperformance and recovery periods.
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How the index-fund expense is disclosed
Vanguard’s 2025 shareholder report lists VOO costs of $3 on a hypothetical $10,000 investment, equal to a 0.03% annual expense ratio. The report also says VOO’s performance was in line with its benchmark for the year ended December 31, 2025. That fee is deducted inside the fund rather than billed separately, so the published return is after the fund’s operating expenses.
VOO is only one example of an S&P 500 index fund. Other funds can have different expense ratios, bid-ask spreads, tracking differences, securities-lending revenue, tax characteristics and trading venues. Check the current prospectus and shareholder report before investing; the 2025 figure is not a promise that the fee will never change.
Why Berkshire has no fund expense ratio but is not cost-free
Berkshire shares do not charge an ETF-style annual expense ratio. You still pay your brokerage’s trading costs, the bid-ask spread and any applicable account fees. More importantly, the share price reflects the market’s valuation of Berkshire’s assets and earning power. Buying at an elevated valuation or selling during a period of pessimism can have a larger effect on your outcome than a few hundredths of a percentage point in fund expenses.
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Berkshire also retains earnings rather than paying a regular dividend. Retention can allow management to reinvest capital without distributing cash, but it means you do not receive a scheduled income stream from a dividend. Your cash generally comes from selling shares, subject to market price and taxes.
Management and succession risk
With an index fund, the portfolio follows published index rules. A committee’s methodology determines eligibility and weighting, and the fund provider implements those rules. You still face provider, tracking and methodology risks, but your result is not dependent on one executive selecting acquisitions or allocating every dollar of retained earnings.
With Berkshire, capital allocation is part of the investment thesis. Insurance underwriting, acquisitions, public-stock purchases, repurchases and cash management all matter. The company’s future performance will depend on leaders who take over responsibilities previously associated with Warren Buffett and other long-serving executives. A capable succession plan may preserve Berkshire’s culture, but no investor can know in advance whether future decisions will match the historic record.
This dependence is a reason to own Berkshire only if you are comfortable evaluating the company as an ongoing business, not merely assuming that its historical reputation will persist. It also creates a monitoring obligation: read annual reports, follow major capital-allocation announcements and reassess whether the valuation still compensates you for the risks.
Risk, volatility and the possibility of long underperformance
An S&P 500 fund can decline substantially because its holdings are all exposed to the same economy, interest-rate environment and investor sentiment. Diversification limits the damage from one company failing; it does not prevent a broad market loss. You need the ability to stay invested through those declines.
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Berkshire may behave differently from the index because its insurance operations, operating subsidiaries, cash and investment portfolio have a different mix of exposures. That difference can help or hurt in any particular period. Berkshire can underperform the index for years even if the business remains sound, especially when high-growth sectors lead the market or when investors assign a lower valuation multiple to conglomerates.
Single-company concentration adds a second layer of uncertainty. A severe insurance event, accounting issue, legal liability, cyber incident, regulatory change or succession problem could affect Berkshire in a way that an index fund’s many issuers would not experience simultaneously. Internal diversification is valuable, but it is not the same as owning an independent portfolio of companies.
Taxes and cash-flow differences
Tax results depend on your country, account type, holding period, tax basis and local rules. Neither investment should be labeled universally tax-superior without those details.
- Berkshire has historically retained earnings rather than paying a regular dividend, so taxable cash distributions may be limited in a taxable account. Selling shares can still create a capital gain or loss, and the timing is controlled by you.
- An S&P 500 fund can distribute dividends and capital gains, depending on the fund’s holdings and activity. Selling fund shares can also create a taxable gain or loss.
- Retirement and other tax-advantaged accounts can change the timing or treatment of distributions and sales, but their rules differ by jurisdiction and account.
- Do not choose solely on the expectation that one structure will always produce a lower tax bill. Review the fund’s current tax documents and consult a qualified local adviser for personal advice.
A practical decision process
Use the following sequence before placing an order. It is designed to prevent a memorable historical statistic from becoming an accidental allocation rule.
- Define the job of the money. Identify the goal, time horizon, required liquidity and the largest loss you could tolerate without selling in panic. Money needed soon should not be committed to either equity choice simply because the long-term record is strong.
- Check your existing exposure. Employer plans, retirement accounts and other holdings may already make you heavily concentrated in U.S. large-cap stocks or in a particular company. Add the proposed position to your whole-portfolio view, not just the account where you will buy it.
- Choose the desired source of return. Select the index fund if you want market exposure with minimal company-specific judgment. Select Berkshire only if you specifically want its collection of businesses, investments and management decisions.
- Set a concentration limit. Decide in advance what percentage a single company may occupy and what you will do if appreciation pushes it above that limit. A written rule is easier to follow than an emotional decision after a rally.
- Compare the current documents. For a fund, read the prospectus, expense ratio, benchmark description, tracking history and distribution policy. For Berkshire, read the latest annual report, shareholder letter, insurance information, cash and investment disclosures, and succession commentary.
- Pick an implementation schedule. A diversified fund can be purchased according to your normal contribution plan. If buying Berkshire, consider whether a staged purchase better matches your risk tolerance than committing the entire amount on one day; staging does not remove market risk or guarantee a better price.
- Write the sell or rebalance rule before buying. Selling because the market moved is different from selling because your thesis, time horizon or risk capacity changed. Document the distinction.
Who is better served by an S&P 500 index fund?
- Hands-off investors: You want one holding that broadly represents U.S. large-cap equities and do not want to analyze a company’s capital allocation.
- Investors building a core allocation: You need a transparent, easily monitored base before adding bonds, international stocks or other diversifiers.
- People with limited research time: The fund’s index methodology and routine disclosures reduce the need to follow one management team closely.
- Investors who dislike single-stock risk: You prefer that one company’s legal, operational or succession problem not dominate the result.
The index fund is not automatically appropriate for every goal. It still represents equities, can lose value quickly and leaves you concentrated in one country and one market-cap segment. Pairing it with suitable cash or fixed-income reserves may be necessary for a shorter horizon or a lower risk capacity.
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Who might deliberately choose Berkshire Hathaway?
- Investors seeking a company-specific thesis: You believe Berkshire’s businesses, balance sheet, culture and capital allocation deserve a place beyond a standard index allocation.
- People comfortable with management dependence: You accept that future leaders and succession execution will influence results.
- Long-horizon owners who can tolerate tracking error: You can hold through periods when Berkshire trails the S&P 500 without abandoning the plan solely because the index is winning.
- Investors who will monitor the business: You are prepared to read filings and reassess valuation, insurance risk, cash deployment and governance.
Owning Berkshire for these reasons is different from assuming it is a risk-free substitute for a fund. The company can be financially strong and still underperform, and a favorable reputation cannot guarantee future returns.
Can you own both?
Yes. A combination can separate two objectives: the index fund supplies broad large-cap exposure, while Berkshire provides a deliberately sized active or company-specific position. The combination is not automatically more diversified, because Berkshire’s publicly traded investments and operating businesses can overlap economically with companies in the S&P 500.
Set the Berkshire percentage according to your ability to withstand company-specific underperformance. Keep the index fund’s role clear, rebalance according to a written schedule or tolerance band, and avoid letting a rising Berkshire share quietly turn a modest satellite position into the portfolio’s dominant risk.
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For an S&P 500 fund
- Verify the current expense ratio and benchmark in the latest prospectus or shareholder report.
- Check whether performance is tracking the benchmark after expenses and normal implementation differences.
- Review distributions, tax documents and any changes to the fund structure.
- Rebalance the overall portfolio rather than trading every time an individual constituent changes.
For Berkshire Hathaway
- Read the annual report and shareholder letter, focusing on insurance underwriting, operating earnings, investments, cash and debt.
- Assess major acquisitions, share repurchases and other capital-allocation decisions against your original thesis.
- Watch succession disclosures and changes in key responsibilities, not just the share price.
- Compare the market value with your estimate of the businesses and investments, while recognizing that valuation estimates are uncertain.
Monitoring is not a promise of better returns. It is the minimum discipline required when your outcome depends on one company rather than an index process.
Common mistakes to avoid
- Extrapolating the 19.7% figure: A historical compound return is not a forecast and should not be used as a required annual target.
- Treating diversification as protection from all losses: An S&P 500 fund can fall sharply because its holdings share broad market risks.
- Calling Berkshire an index substitute: Its subsidiaries and investments create internal breadth, but the issuer remains one company.
- Ignoring valuation: A good business can be a poor purchase at an excessive price; a low-fee fund can also be bought at an unsuitable time for your cash needs.
- Choosing on taxes alone: Account rules and jurisdiction determine outcomes, and both holdings can create taxable events.
- Checking only the price chart: Review business results, fund tracking, distributions and your own allocation instead of reacting to headlines.
- Using money needed soon: Neither choice is a substitute for an emergency reserve or a short-term cash plan.
Primary-source background
Berkshire’s official shareholder-letter archive notes that a book compiling the full, unedited letters to shareholders from 1965 through 2024 is available. Those letters provide first-person explanations of Berkshire’s philosophy and decisions, but they remain historical documents rather than a guarantee about future management or returns.
For the fund side, use the current shareholder report and prospectus for the exact expense ratio, benchmark language, distributions and risks that apply when you invest. Product terms can change, so a figure reported for 2025 should be treated as dated information, not a permanent contract.
Final decision rule
Make the S&P 500 index fund your default when your priority is broad U.S. large-cap exposure, low ongoing fund costs and minimal dependence on one management team. Choose Berkshire only when you can articulate why one-company ownership belongs in your portfolio, accept the possibility of extended underperformance and have a plan for concentration and succession risk. The historical advantage reported for 1965–2025 is worth understanding, but it cannot decide the next 20 years for you.
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