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Book of the Month — September: Margin of Safety by Seth Klarman
Key takeaways
- A margin of safety means buying an asset well below its intrinsic value — the gap provides protection when you make a mistake.
- Klarman argues that losses are psychologically harder to bear than the pleasure of equivalent gains — so avoid risk proactively.
- The book teaches you to think about investing as capital preservation, not merely return maximization.
- The first question is "How much can I lose?" and only then "How much can I make?".
- The book is hard to obtain today and expensive physically — legal digital copies exist in some specialist libraries and online reading platforms.
Margin of Safety by Seth Klarman is one of the most cited and at the same time most elusive books on value investing. Klarman formulates an approach that places capital preservation before return maximization — and this idea is timeless.
The Core Idea: Buy with a Cushion
The margin of safety is the difference between the price you pay for an asset and its intrinsic value. The larger this gap, the more room for error. Klarman does not believe every company can be valued precisely — which is why he insists the cushion must be large enough to cover both analytical error and unforeseen events.
Risk as the First Question
Most investors ask: "How much will I make?" Klarman reverses the order: "How much can I lose?" This loss aversion is not a weakness but a rational approach. A 50% loss requires a 100% gain to return to the starting point. The asymmetry of risk and return is mathematical reality, not psychological weakness.
Who the Book Is For
The book assumes a reader with the basics in place — someone who understands a balance sheet, an income statement, and concepts such as P/E or free cash flow. A complete beginner will get less out of it; an investor with a few years of experience will benefit most. It suits anyone thinking about selecting individual stocks or bonds.
Availability and Price
The original 1991 edition was never reprinted, and copies sell for high prices on the secondary market. Klarman intentionally prevents mass publication. Legal digital versions are nevertheless available through certain specialist libraries. For more recommended reading, visit our book section.
- Loss aversion: we feel a loss more acutely than an equivalent gain
- Margin of safety: buy at a sufficient discount to intrinsic value
- Risk first: first assess what can go wrong
- Patience: waiting for the right opportunity is part of the strategy
If you are interested in value investing in relation to selecting specific companies, look at our company analyses, where we apply these principles in practice.
FAQ
What is Margin of Safety about?
It is a book on value investing by Seth Klarman. The key ideas are: buy assets with a margin of safety below their intrinsic value, always assess the risk of loss before potential return, and never rush for a yield.
Who is Margin of Safety suitable for?
For investors who already understand basic financial statements and are thinking about selecting individual stocks or bonds. A complete beginner will get less out of it — I recommend mastering the basics of passive investing first.
Why is the book so expensive and hard to find?
The original 1991 edition was never reprinted. Klarman intentionally prevents mass publication, so physical copies sell for high prices on the secondary market. Legal digital copies are available in some specialist libraries.