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Security Analysis cover

Security Analysis

Principles and Technique
by Benjamin Graham & David Dodd

First published in 1934, in the shadow of the Great Crash — the original textbook that invented value investing as a discipline, and the direct source of both "margin of safety" and "intrinsic value," fifteen years before The Intelligent Investor made either phrase famous.

Start Reading — Chapter 1 →
Why this book

The Intelligent Investor, covered earlier in this Book Club, is Graham's own popularization of ideas he and Dodd first laid out here, five years earlier, as a rigorous professional and academic textbook rather than a book for general readers. Where that book teaches the philosophy in accessible form, this one is the source: the original, more technical case for treating security analysis as a discipline with real standards of evidence, not a set of hunches dressed up as expertise.

This course covers the book's argument in four parts: the strict, original definitions of investment and intrinsic value the whole discipline is built on, the analysis of bonds and senior securities that made up the bulk of the original 1934 edition, the analysis of common stocks and the specific warnings about trusting reported earnings that still read as remarkably current, and the practical techniques — including the "net-net" approach to buying below liquidation value — that Graham used himself and that a young Warren Buffett later learned directly from him.

Table of Contents
The Investment Framework
1
Investment vs. Speculation, Formally Defined
2 min
The original version of the distinction Graham would later popularize in The Intelligent Investor — written here as a rigorous, professional standard, not a general-audience rule of thumb.
2
The Concept of Intrinsic Value
2 min
Why Graham and Dodd insist intrinsic value is a range that can be reasonably estimated, not a precise number — and not simply whatever the market currently says.
Analyzing Fixed-Income Securities
3
Bond Safety: Coverage Ratios and the Origin of "Margin of Safety"
2 min
The phrase that later became synonymous with value investing was coined here first, applied to a specific, checkable measure of bond safety.
4
Senior Securities and the Priority of Claims
3 min
Why understanding exactly where a security sits in a company's capital structure matters as much as understanding the company itself.
Analyzing Common Stocks
5
Quantitative Analysis: What the Numbers Can Tell You
2 min
Graham and Dodd's case for grounding common stock analysis in demonstrated, historical financial results rather than projections of future growth.
6
The Perils of Trusting Reported Earnings
2 min
A remarkably early, still-relevant warning: reported earnings can be shaped by accounting choices in ways that mislead investors who take the headline number at face value.
7
Qualitative Factors: Management, Industry, and the Limits of Numbers
2 min
The authors' own acknowledgment that quantitative analysis, however central, has real limits — and what to do about the factors numbers can't fully capture.
Applying the Discipline
8
Net-Net Stocks and Buying Below Liquidation Value
2 min
Graham's most famous specific technique: buying a company for less than its current assets alone are worth, management and future earnings thrown in for free.
9
Market Fluctuations and Mr. Market's Precursor
2 min
Before the famous Mr. Market allegory in The Intelligent Investor, this book laid out the same core insight in more technical, less anecdotal form.
10
Why This Book Still Matters
2 min
Nearly a century on, the specific techniques have evolved, but the discipline this book invented remains the direct ancestor of value investing as practiced today.