Warren Buffett
Not a biography. A reconstruction of how Buffett selected businesses, priced them, financed them with insurance float, concentrated when the odds were extreme, and wrote his own errors into the Berkshire record. Facts are tied to partnership letters (1957–69) and chairman’s letters (1977, 1986, 1989, 1992, 2007, 2010, 2013, 2020), the Owner’s Manual, and Berkshire filings. Interpretations are marked.
1. Life timeline
| Period | What formed the allocator |
|---|---|
| 1930–49 | Born 30 August 1930, Omaha. Father Howard Buffett, broker then congressman. Early paper routes, pinball, and odd-lot trading. The habit that survives is counting cash. |
| 1947–51 | University of Nebraska, then Columbia under Benjamin Graham and David Dodd. 1951 visit to GEICO with Lorimer Davidson: a direct writer with a cost advantage, not a net-net. First documented quality observation. |
| 1954–56 | Graham-Newman. Cigar-butt work: buy below net current assets, sell when the gap closes. Partnership starts May 1956. |
| 1957–69 | Buffett Partnership Ltd. Three buckets in the letters: generals, workouts, controls. Partnership record, as reported in the letters, about 29.5% compounded annually before the limited-partner fee split versus about 7.4% for the Dow. Closed in 1969 because bargains had disappeared. Partners received cash and proportional Berkshire / Diversified Retailing stock. |
| 1962–65 | Accumulated Berkshire Hathaway, a New Bedford textile. Control in 1965. Later letters treat this as a capital-allocation error: a cheap stock attached to dying economics. |
| 1967–72 | National Indemnity (1967) creates the float engine. Blue Chip Stamps, with Munger, supplies another prepaid pool. 1972: See’s Candies, the hinge from asset cheapness to pricing power. |
| 1973–76 | Washington Post in the 1973–74 bear market. GEICO rescue in 1976 after a reserving crisis. |
| 1983–89 | Nebraska Furniture Mart. Owner’s Manual principles. Coca-Cola accumulation from 1988. 1989 letter states the rule already in use: a wonderful company at a fair price beats a fair company at a wonderful price. |
| 1995–2010 | Remaining GEICO bought 1995–96 for about $2.3 billion. Gen Re (1998) later produces reserving and derivatives pain. BNSF announced 2009, closed 2010. |
| 2011–20 | Bank of America preferred plus warrants (2011). IBM bought, then exited. Apple first appears in 2016 holdings. Four airline stakes bought, then sold in full in 2020. |
| 2021–26 | Cash and T-bills as the residual decision. Buybacks only below estimated intrinsic value. Large reduction of Apple in 2024. Greg Abel named successor. The late letters still carry the error catalogue. |
2. Investment evolution
Early belief
A stock is cheap if price is below a conservative liquidation or private-market value. Holding period is a function of the discount closing. Quantitative margin of safety does the work that business quality later does.
What changed, and why
Scale plus Munger. Cigar butts cannot absorb billions. See’s showed a brand with pricing power and almost no incremental capital throws off cash that buys the next business. The 1989 letter is the public statement of a shift executed in 1972. Interpretation: quality moved the margin of safety from the balance sheet to the durability of owner earnings.
What did not change
- A share is a fractional business.
- Margin of safety. Quality changes where it sits; it does not repeal it.
- Circle of competence. The edge matters more than the size.
- Per-share intrinsic value, not empire size.
- Permanent capital loss is the risk that matters. Volatility is the quote.
3. Major investments
See’s Candies, 1972
Documented Bought through Blue Chip for $25 million. Sales about $30 million; pre-tax earnings under $5 million (2007 letter). The seller asked $30 million; Buffett later wrote he almost walked away above $25 million. By 2007 sales were $383 million and pre-tax profit $82 million, on about $40 million of capital, so incremental capital since 1972 was about $32 million. He has said the business produced well over $1 billion, later over $2 billion, of pre-tax earnings. Saw: western boxed-chocolate brand with pricing power and honest operators. Others missed: a high multiple of tangible book was cheap against untaxed cash that did not need reinvestment. Valuation: roughly mid-single-digit pre-tax multiple, but the logic was a reinvestment rate near zero plus price increases. Risk: regional brand, cocoa, key person. Today: separate maintenance capital from growth capital before calling a consumer brand a compounder.
Washington Post, 1973
Documented Cost about $10.6 million. The 1985 letter says the purchase was at not more than one-fourth of then per-share business value of a dominant franchise. Catalyst was time and cash. Miss: the franchise was not perpetual. Later letters treat newspaper economics as impaired by the internet. A correct 1973 valuation can still be a bad 2005 hold if the moat thesis dies.
GEICO, 1951 / 1976 / 1996
Documented 1951: Davidson explained the direct-writer cost advantage. 1976: after a reserving crisis, Berkshire bought convertible preferred and then common while the market treated the franchise as impaired. 1995–96: remaining shares for about $2.3 billion. Others missed in 1976: a low-cost producer with a damaged balance sheet is not a high-cost producer with a damaged balance sheet. Risk: growth ahead of capital and dishonest reserves. Float is an asset only if the combined ratio and reserving are disciplined.
Coca-Cola, 1988–94
Documented Accumulation began after the 1987 crash. Cost basis about $1.3 billion. Saw: global brand, bottler system, pricing, high incremental returns under Roberto Goizueta. Missed by cigar-butt training: a mid-teens multiple can be cheap if owner earnings compound for decades. Risk: valuation and volume, not insolvency. He did not sell when the late-1990s multiple was too high. That non-sale is a hold decision, not proof that price never matters.
BNSF, 2010
Documented Announced November 2009, closed February 2010, $100 a share in cash and stock. The 2010 letter describes a purchase on the order of $34 billion of cash and stock; assumed debt took the commonly cited enterprise cost toward $44 billion. Saw: an irreplaceable western rail whose replacement cost exceeded the price, with a long-haul advantage versus trucks. Risk: regulation, unions, fuel, cyclical volumes, and paying partly with Berkshire stock — the Dexter error in form. Capital intensity is acceptable when incremental returns and replacement barriers are both high.
Bank of America, 2011
Documented $5 billion of 6% preferred plus warrants on 700 million shares at $7.14. Asymmetry was in the contract: income if the bank survives, equity upside if confidence returns. Risk: another crisis in a leveraged balance sheet.
Apple, from 2016
Filings First disclosed in 2016, on the order of 61 million shares by year-end, later expanded. Saw: a consumer franchise with switching costs, an installed base, services attach, and buybacks. See’s/Coke logic, not a venture-technology conversion. Risk: regulation, China supply chain, premium multiple. Large sales in 2024 reduced the stake while it remained a top holding. Interpretation: trimmed for concentration and tax, not a declared false thesis.
Float, from National Indemnity 1967
Documented Premiums held before claims are paid became the funding advantage. Letters show float growing into the tens and then over $100 billion, often at negative cost when underwriting profits. Rule inside the model: float is cheap leverage only while reserves are adequate. Gen Re after 1998 is the counter-example he wrote about.
4. Mental models
Owner earnings
1986 letter. Reported earnings plus non-cash charges minus average annual capital spending required to maintain competitive position and unit volume. Not EBITDA. Maintenance capex is a judgment, and he says so.
Mr Market
Graham’s partner who quotes a price every day. Use the quote. Do not take instructions from it.
Circle of competence
Size matters less than knowing the edge. Avoidance is a position.
Institutional imperative
1989 letter. Managers imitate peers and spend cash because it is there. Berkshire’s answer was decentralised operators plus a central allocator who can sit on cash.
Opportunity cost
Every purchase rejects the next best use, including cash and buybacks. Hold-forever is a slogan. The rule is hold while the moat and the alternative both justify it.
Float versus debt
Prefer prepaid premiums to parent-company debt, provided underwriting discipline holds.
Intrinsic value, in his usage, is the discounted value of cash that can be taken out during the remaining life. He refuses false-precision DCF in the letters and still requires the idea of one.
5. Primary-source evidence
- Partnership letters, 1957–1969: generals, workouts, controls, and the decision to shut the partnership.
- 1977 letter: acquisition criteria — size, demonstrated earning power, good returns on equity with little debt, management in place, simple businesses, an offering price.
- 1983 Owner’s Manual, later restated: partnership attitude, per-share progress, reluctance to issue shares.
- 1986 letter: owner-earnings appendix.
- 1989 letter: wonderful company at a fair price; institutional imperative.
- 1992 letter: look-through earnings.
- 2007 letter: Great, Good, and Gruesome, with See’s as the great business. Dexter called the worst deal.
- 2013 letter: Energy Future Holdings — about $2 billion of bonds, $837 million interest received, sold for $259 million, pre-tax loss about $873 million.
- 2020 letter: airline sale described as a mistake in assessing the industry.
- Berkshire 10-K equity and insurance footnotes for position size and float. Letters outrank meeting transcripts when they conflict. Biographies are secondary.
6. What he got wrong
- Berkshire textiles, 1965. Control of a cheap stock that could not earn its cost of capital. Mills closed in 1985. He kept the name and used the shell.
- Dexter Shoe, 1993. About $433 million in Berkshire stock. 2007 letter: the worst deal; those shares were worth about $3.5 billion by then. Bad business, and payment in undervalued currency.
- USAir preferred, 1989. $358 million into an airline cost structure. Later recovered after restructuring. Outcome luck does not cancel the process error he documented.
- Energy Future Holdings bonds. A bet on natural-gas prices via a leveraged holding company. Outside the circle.
- IBM, 2011–18. A fading services franchise treated as a durable coupon. Exited at a loss.
- Airlines, sold 2020. American, Delta, United, Southwest. 2020 letter: wrong about the industry under stress.
- Newspapers and some retail. Moat decay recognised after the cash had already been excellent.
- Gen Re, 1998. Underwriting and the derivatives book were worse than expected. Scale did not confer safety.
7. Investor playbook
| Decision | Operating rule |
|---|---|
| Select | Understand the business in a page. Ten-year economics roughly foreseeable. Consistent earning power. Managers who allocate as owners. |
| Value | Owner earnings, not EBITDA and not next year’s EPS. Discount conservatively. Do not pay for growth you cannot see. Compare with cash and a buyback of your own shares. |
| Management | Integrity first, then allocation skill. Watch share issuance and what retained earnings earn. |
| Moat | Pricing power, low-cost production, or a barrier a well-funded rival cannot cross in a decade. Brand without pricing power is a slogan. |
| Debt | Do not stack operating leverage on financial leverage. Parent cash is an option, not a failure of imagination. |
| Concentration | Few positions when odds and understanding are both extreme. Diversification protects against ignorance, which is the normal state outside the circle. |
| Crashes | If the business is unchanged, a lower price raises expected return. Cash is what makes that operational. 1974, 1987, 2008–09, and 2020 are the record. |
| Buy, hold, sell | Buy below a conservative value. Hold while moat and allocation hold and no clearly superior use exists. Sell when the thesis breaks, when your own shares are the cheaper currency to issue, or when a much better use appears. |
8. Modern application
Still transfers
Owner earnings. Per-share thinking. Opportunity cost versus cash. Distrust of adjusted EBITDA. Circle of competence as a risk system. Writing errors down. Crash temperament funded by liquidity.
Does not transfer blindly
1970s newspaper economics. Brand plus television as a sufficient moat. Assuming a small investor has Berkshire’s float, deal flow, or tax position. Treating every installed-base software firm as See’s. Leases, stock-based pay, and capitalised development hide more cash leakage than a 1986 industrial statement. A buyback above intrinsic value is not Buffett-like merely because the share count falls.
9. Case study
Asian Paints — write the memo before you open the solution
- Circle: dealer density, tinting machines, working-capital cycle, input pass-through.
- Moat versus Berger, Kansai Nerolac, and new organised players. What would a rival need to take 500 basis points of volume?
- Owner earnings: profit after tax + depreciation − maintenance capex you can defend. Separate depot growth capex. Incremental return on that growth capex for five years.
- Allocation: dividend, buyback, capacity, promoter behaviour.
- Price: owner-earnings yield versus a 10-year government bond and versus the multiple Berkshire paid for Coke in 1988–89, not the multiple Coke later traded at.
- Pass condition: the price or fact that makes you refuse a wonderful business.
Model solution — open after you write
Asian Paints has See’s/Coke features: a brand that takes price, a dealer and tinting base that is expensive to replicate, and historically high returns on incremental depot capital. Housing cycles hit volume; they do not by themselves kill the franchise. The usual failure is the multiple. A wonderful paint company at 60–80× conservative owner earnings fails the 1988 Coke test unless year-10 owner earnings are defensible without assuming further large share gains and frictionless raw-material pass-through. Quality is necessary and not sufficient. A Buffett-style decision at a full price is to pass and keep cash, or to buy only a size that assumes the moat persists and the multiple compresses. Promoter conduct and any step-up in working capital are the monitoring items, not the quarterly volume print.
10. Implementation challenge
- Primary source. Read the 1989 or 2007 Berkshire letter end to end. Extract one principle, one number, one named mistake, and one rule you will use. Ten lines.
- Owner earnings. For one company you own or follow, compute owner earnings. State maintenance capex as an assumption and a range. Do not use adjusted EBITDA.
- Sell journal. For your largest holding, write what would make you sell. If the only answer is a lower quote, rewrite it until the answer is a broken moat, broken allocation, or a clearly better use of the capital.
11. Top Investor scorecard
Scores your implementation this week, not Buffett. Baseline until the three artifacts exist.
+1 valuation when the owner-earnings sheet exists with a capex range. +1 behaviour when the sell journal is not price-triggered. +1 independence when the Asian Paints memo disagrees with a broker target and states the cash-yield reason.
12. One-page cheat sheet
Investor
Warren Buffett. Allocator through a partnership, then through Berkshire’s operating companies and insurance float.
Core philosophy
Buy pieces of understandable businesses below conservative owner-earnings value, and hold while that remains true.
Key models
Mr Market. Margin of safety. Circle of competence. Owner earnings. Opportunity cost. Institutional imperative. Float.
Favourite questions
Would I buy the whole company? How much cash can be taken out over ten years? What kills the moat? What are retained earnings earning?
Valuation
Discount owner earnings. No undefended growth. Judge price against per-share intrinsic value and against cash.
Risk rules
Permanent loss, not volatility. Distrust leverage. Stay inside competence. Cash is an option on forced selling.
Biggest documented mistake
Dexter Shoe paid in Berkshire stock. The textile control purchase is the earlier version of the same error.
Five rules
Business first. Write owner earnings. Pay for durability, not a story. Name errors in ink. Inactivity is a decision.
13. Next-level reading
- Berkshire chairman’s letters, 1977, 1986, 1989, 1992, 2007, 2013, 2020 — berkshirehathaway.com.
- Buffett Partnership letters, 1957–1969.
- An Owner’s Manual, as restated on the Berkshire site.
- Lawrence Cunningham, The Essays of Warren Buffett — a topical index of the letters, not a substitute.
- Latest Berkshire Form 10-K, float footnote and equity-investment table.
Cumulative learning system
Week 01 is the base layer. Nothing earlier is on the system. Carry four tests into every later investor: Is it a business or a security? What is owner earnings after maintenance capital? Where is the circle’s edge? What did the investor write down as an error?
Week 02 is Charlie Munger. Expected connection: he is the pressure that moved Buffett off cigar butts. Expected disagreement: he will price a great business more willingly, and will treat a lattice of models as the defence against a single accounting ratio. Do not merge them yet. Keep Buffett’s price discipline as the constraint Munger has to clear.
Sequence: Buffett → Munger → Graham → Fisher → Lynch → Templeton → Marks → Klarman → Greenblatt → Pabrai → Li Lu → Nick Sleep → Jhunjhunwala.