Seth Klarman
Peer value investor — referenced for patient, margin-of-safety-driven approach
Biography
Seth Klarman (born 1957) founded the Baupost Group in 1982 and has managed it for over 40 years, generating one of the most consistent long-term records in investment management. Baupost invests in a range of asset classes — public equities, distressed debt, real estate, private transactions — but is unified by a single principle: buy only when there is a substantial margin of safety between price and conservative estimates of intrinsic value.
Klarman wrote Margin of Safety in 1991. The book went out of print and has never been republished. Used copies command prices between $500 and $2,000. This cult status is itself an illustration of value investing: the content of the book advocates buying at discounts to intrinsic value; the book itself has become a collector's item priced far above any rational assessment of its content value relative to freely available alternatives.
Beyond Baupost, Klarman holds a particular position in the value investing tradition: he is among its most respected practitioners and one of its most private. Baupost has returned capital to investors on occasions when Klarman judged the opportunity set too thin to justify full deployment — a decision almost unheard of among managers who are paid to stay invested. His working relationship with Marks is concrete rather than ceremonial. In 2005 the two collaborated on the updated edition of Benjamin Graham and David Dodd's Security Analysis, the text both men treat as foundational, with Klarman directing the project and assigning sections to practitioners whose own records embodied Graham's principles. Marks was given the section on fixed-value investing — an assignment that, as the Key Stories below describe, turned out to carry a message of its own.
Klarman appears in only 2 memos with 4 total mentions — a smaller footprint than his stature in the investment community might suggest. The likely reason: his work is concentrated in public equities and special situations, while Marks' is concentrated in credit. The philosophical overlap is enormous; the operational overlap is limited.
Key Stories
Margin of Safety — The Book — Klarman's Margin of Safety is one of very few investment books Marks recommends unconditionally alongside Graham's The Intelligent Investor. Its central message is simple: the only reliable source of investment safety is buying at a significant discount to conservative estimates of intrinsic value. All other apparent sources of safety — diversification without value discipline, stop-losses, or macro positioning — are illusory. Marks describes this message as the most important single lesson in investing.
The Patience Discipline — Klarman is known for holding substantial cash — sometimes 30-40% of Baupost's assets — when he cannot find investments that meet his margin-of-safety criteria. This discipline — saying 'there is nothing worth buying today' — is extraordinarily rare in institutional investing, where managers are typically evaluated on their relative performance versus a benchmark and face career risk from holding cash while the market rises. Marks cites Klarman's patience as evidence that genuine value discipline, in practice, means regularly concluding that prices are too high.
Reputation as the Market Proxy — In value investing circles, Klarman's view on the attractiveness of the current opportunity set is considered a useful signal. When Klarman is fully invested, the universe of value opportunities is likely large. When he holds large cash balances, the universe is likely small. Marks occasionally references Klarman's positioning as one data point in assessing market valuation.
The Security Analysis Assignment — In 2005, Klarman asked Marks to contribute to the updated edition of Graham and Dodd's 1940 Security Analysis — the "bible of value investing" — and gave him the section on fixed-value investing. Editing it, Marks came across Graham and Dodd's description of fixed-income investing as "a negative art": since every bond that pays delivers the same promised return, performance is determined not by what you buy but by what you exclude. The discovery was humbling and validating at once. Oaktree had adopted "if we avoid the losers, the winners will take care of themselves" as its motto at the firm's founding in 1995, believing the phrasing original; Graham and Dodd had anticipated the idea by roughly half a century. Marks recounts the episode with evident good humor — and notes that it was Klarman who put the passage in front of him. The detail captures how the two men relate: through shared texts and shared convictions rather than shared deals.
"Someone I Respect" — When Marks closed his 2013 memo "The Role of Confidence," he did something he rarely does: he handed the final word to someone else. His long-run worry at the time — intractable deficit spending, unsustainable entitlement promises, and a total dearth of responsible action in Washington — had, in his judgment, already been expressed better than he could express it himself, so he simply quoted Klarman's year-end letter at length. The letter argued that there is no free lunch in economics, that prior misplaced confidence in the Federal Reserve had contributed greatly to the complacency that turned the 2008 downturn into a full-blown crisis, and that a price for the day's policy excesses — an equal and opposite reaction — had yet to be paid. Marks added only that he agreed. Deference of that kind, from a writer of Marks' standing, is a precise measure of where Klarman sits in his hierarchy of peers.
Impact on Marks' Work
The Margin of Safety Validation: Klarman's 40-year Baupost record is independent evidence — in a different market (public equities and special situations) using a different implementation (more diversified, more equity-focused) — that the Graham margin-of-safety framework generates durable superior returns.
Patience as a Strategy: Klarman's demonstrated willingness to hold very large cash positions — accepting guaranteed underperformance versus an invested benchmark in any given year — in exchange for the option to deploy at genuinely attractive prices is one of the most disciplined expressions of value investing in practice.
The Negative Art: The Graham and Dodd passage Klarman assigned to Marks in 2005 supplied the intellectual pedigree for Oaktree's founding motto. Bond investing is a negative art: all the bonds that pay deliver the same return, so results hinge entirely on the defaults avoided. Marks had reached the same conclusion independently through two decades of high yield practice; Klarman's editorial assignment connected that practice back to the canonical text — and reminded Marks that genuinely important investment ideas tend to be rediscovered rather than invented. The episode also explains why the two men's names travel together despite different markets: both treat margin of safety not as a preference but as the only dependable definition of safety.
Skepticism of Free Lunches: Klarman's 2013 warning — that governments cannot print or borrow in astronomical amounts without eventual consequences, and that confidence in the Federal Reserve had itself become a source of fragility — mirrors Marks' own refusal to treat policy support as a permanent feature of markets. Both men regard apparent safety conferred by central banks as borrowed rather than earned, and both position for the day the bill arrives. That shared skepticism is why Marks chose Klarman's words, not his own, to close a memo about the limits of confidence.
Key Passages From Marks' Memos
"Since I see no reason to reinvent the wheel when someone I respect has said something better than I could, I'll close with a few words from Seth Klarman (emphasis added). Seth doesn't find much in the things he discusses to inspire confidence, and I agree:"
— The Role of Confidence (2013)
"But in 2005, while working with Seth Klarman to update the 1940 edition of Benjamin Graham and David Dodd's Security Analysis"
— Fewer Losers, More Winners (2023)
"In the section Seth asked me to edit, I came across Graham and Dodd’s description of “fixed-value” (or fixed-income) investing as “a negative art.”"
— Fewer Losers, More Winners (2023)
"There is no free lunch in economics: if governments could print or borrow money in astronomical amounts without any major adverse consequences, why wouldn’t they always do this, forever avoiding downturns while their countries bask in the sunshine of limitless prosperity?"
— The Role of Confidence (2013), quoting Klarman's year-end letter
"Of course there will be a price to pay for today’s policy excesses – an equal and opposite reaction. We just haven’t seen it yet."
— The Role of Confidence (2013), quoting Klarman's year-end letter
Referenced In
Source: Howard Marks Knowledge Base — Oaktree Capital Management memos 1990–2025