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Security Analysis
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Security Analysis

by Benjamin Graham & David Dodd

4.6/5

The foundational textbook of fundamental analysis, first published in 1934. Graham and Dodd created the discipline of security analysis from scratch, establishing the framework that professional analysts still use today.

Published 1934
800 pages
10 min read
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Quick Overview

First published in 1934 in the wreckage of the Great Depression, Security Analysis created the entire discipline of fundamental securities analysis. Graham and Dodd systematically explained, for the first time, how to evaluate a bond's safety, estimate a stock's intrinsic value, and identify the difference between investment and speculation. This is not casual reading. It is the graduate-level textbook that gave generations of professional investors their intellectual framework.

Book Details

AttributeDetails
TitleSecurity Analysis
AuthorsBenjamin Graham & David Dodd
PublisherMcGraw-Hill
First Published1934
Current Edition7th (2022)
Pages~800
Reading LevelAdvanced
Best ForProfessional analysts and serious students

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About the Authors

Benjamin Graham (1894-1976) survived the 1929 crash, losing most of his investment fund's capital, and channeled that experience into building a systematic approach to security valuation. He taught at Columbia Business School for 28 years and is widely known as the father of value investing.

David Dodd (1895-1988) was Graham's teaching assistant at Columbia who became his co-author and eventually a full professor himself. The book grew from class notes they developed together in 1927-1934.

The 7th edition (2022) features commentary from modern value investors including Seth Klarman, Joel Greenblatt, Howard Marks, and others, bridging the 1934 framework to contemporary markets.


Why This Book Matters

Security Analysis was written immediately after the 1929-1932 crash, during which the Dow Jones fell 89% and thousands of companies went bankrupt. The prevailing investment "wisdom" of the 1920s had been largely speculative. Graham and Dodd's radical contribution was to argue that securities could be analyzed systematically, that price and value were distinct, and that buying cheap assets with a margin of safety was a sustainable strategy.

Everything in modern fundamental analysis traces to this book:

  • Earnings per share analysis
  • Price-to-earnings ratios
  • Book value and net asset value
  • Bond covenant analysis
  • The distinction between investment and speculation
  • Warren Buffett took Graham's class twice and has called this the most important investment book ever written, calling The Intelligent Investor the more readable version for general audiences.


    The Investment vs. Speculation Distinction

    Graham and Dodd open with the most important distinction in investing:

    "An investment operation is one which, upon thorough analysis, promises safety of principal and an adequate return. Operations not meeting these requirements are speculative."

    This three-part test changed finance:

    CriterionInvestmentSpeculation
    Thorough analysisRequiredOptional or absent
    Safety of principalExpectedNot guaranteed
    Adequate returnExpectedHoped for

    By this definition, buying a stock at 50x earnings without analyzing the business is speculation, regardless of whether it goes up or down. Buying a net-net stock at 60% of liquidation value after careful analysis is investment.


    Part I: Survey and Approach

    The Three Functions of Analysis

    Graham identifies three purposes of security analysis:

  • Descriptive function: Marshaling facts about a security for systematic presentation
  • Selective function: Reaching judgments about whether a security is worth buying
  • Critical function: Evaluating business management and capital structure decisions
  • Intrinsic Value

    Graham's central concept and the most influential idea in the book:

    Intrinsic value is the value justified by the facts: assets, earnings, dividends, and definite prospects. It differs from market price. The analyst's job is to estimate intrinsic value and act when price diverges significantly.

    Graham is careful to acknowledge that intrinsic value is a range, not a precise number. A stock can be clearly cheap, clearly expensive, or in a zone of uncertainty. The analyst should act only on clear cases.


    Part II: Fixed-Income Securities (Bonds)

    This section, which occupies roughly a third of the book, is the most detailed analysis of bond safety ever written. Graham and Dodd analyze:

    Bond Safety Tests

    TestAdequate Coverage
    Earnings coverage of interest (industrial)3x minimum, 5x preferred
    Earnings coverage of interest (utility)2x minimum, 3x preferred
    Earnings coverage of interest (railroad)1.75x minimum
    Debt as % of capitalization (industrial)Below 50%
    Working capital ratioAbove 2:1

    Seven-year earnings test: Graham requires that earnings be sufficient to cover interest charges not just in recent years but over a full business cycle, including recession years. A bond that passes only in good years does not pass.

    Bond Ratings vs. Graham's Criteria

    Graham was skeptical of bond rating agencies even in 1934, arguing that their ratings often lagged market reality and that independent analysis was superior. This skepticism proved prescient in 2008 when AAA-rated mortgage securities defaulted massively.


    Part III: Senior Securities with Speculative Features (Preferred Stocks, Convertibles)

    Graham and Dodd analyze the hybrid securities that sit between bonds and common stocks. Their key insight: preferred stocks combine the worst features of both asset classes. They lack the contractual obligation of bonds (so the company can skip dividends) while lacking the upside participation of stocks.

    The preferred stock trap:

    FeatureBondPreferred StockCommon Stock
    Contractual obligationYesNoNo
    Priority in liquidationFirstSecondLast
    Upside in good timesLimitedLimitedUnlimited
    Safe in bad timesGenerallyNot alwaysRarely

    Graham's conclusion: preferred stocks belong only in institutional portfolios with specific income requirements. Individual investors are almost always better off with bonds for safety or common stocks for growth.


    Part IV: The Valuation of Common Stocks

    This is the section most relevant to modern investors. Graham and Dodd develop a systematic approach to stock valuation at a time when stocks were viewed primarily as speculative instruments.

    Earnings Analysis

    Graham identifies two types of earnings:

    Normal earnings: The average earning power of the business over a complete economic cycle (Graham recommends 7-10 years)

    Current earnings: The most recent reported figure

    Modern analysts typically focus on current or forward earnings. Graham argued this was dangerous because recent earnings reflect cyclical peaks and troughs. Normalizing earnings across a cycle produces more reliable valuations.

    Example:

    YearActual EPS
    2015$3.20
    2016$3.80
    2017$4.50
    2018$5.10
    2019$4.80
    2020$1.20 (recession)
    2021$5.50
    Average (7-year)$4.01

    Using the average $4.01 rather than the recent $5.50 produces a more conservative and cyclically adjusted valuation.

    The Graham Number

    From Security Analysis, Graham derived a simple valuation formula that bears his name:

    Graham Number = Square Root of (22.5 × EPS × Book Value Per Share)

    The 22.5 comes from Graham's maxim that a stock should not trade above 15x earnings and 1.5x book value simultaneously (15 × 1.5 = 22.5).

    Example:

  • EPS: $4.00
  • Book Value Per Share: $30.00
  • Graham Number: √(22.5 × $4.00 × $30.00) = √$2,700 = $51.96
  • A stock trading below $51.96 passes Graham's basic valuation test.

    Net-Net Working Capital (NNWC)

    Graham's most conservative valuation: buy stocks trading below their net-net working capital value.

    NNWC = Current Assets - Total Liabilities

    If a company has $10 per share in NNWC and trades at $7, you are buying the operating business for free. You receive the liquid assets at a 30% discount and get the factories, equipment, and business operations thrown in.

    Historical returns of net-net investing:

    StudyPeriodAnnual Excess Return vs. Market
    Graham-Newman1926-1956+20% per year
    Oppenheimer (1970-1983)1970-1983+29% per year
    Kok & PotgieterVarious international markets+15-25% per year

    Net-net stocks are rare today in large developed markets. They exist regularly in smaller international markets and occasionally in U.S. micro-cap stocks.


    Part V: Analysis of the Income Account

    Graham devotes substantial attention to the quality of reported earnings, presaging modern forensic accounting:

    Earnings Quality Checklist

  • Are earnings from core operations or one-time items?
  • Are accounting policies aggressive or conservative?
  • Does reported earnings growth match cash flow growth?
  • Are there unusual inventory buildups or receivables growth?
  • Has management changed accounting methods to improve reported results?
  • Warning signs of low earnings quality:

    Warning SignConcern
    Earnings growing faster than cash flowPossible accounting manipulation
    Receivables growing faster than salesCustomers not paying; channel stuffing possible
    Inventory growing faster than salesDemand weakness; write-downs likely
    EBITDA but not EBIT growingDepreciation masking real costs
    Frequent "special charges"Ongoing costs disguised as one-time items

    The 7th Edition (2022) Commentaries

    The 2022 edition adds chapter-by-chapter commentary from prominent modern investors:

    CommentatorPerspective
    Seth KlarmanMargin of safety in modern markets
    Joel GreenblattFormula-based value investing
    Howard MarksRisk and market cycles
    Glenn GreenbergConcentrated value investing
    Bruce BerkowitzAsset-focused investing

    These commentaries are genuinely valuable for translating 1934 principles to current practice. Klarman's remarks on margin of safety are particularly important for understanding how the concept applies in today's information-rich environment.


    Strengths & Weaknesses

    What We Loved

  • Foundational rigor that every subsequent investment book rests upon
  • Bond analysis section is still the most comprehensive for individual securities
  • Net-net framework remains useful for small-cap and international value
  • Earnings quality analysis predated financial shenanigans research by 60 years
  • 7th edition commentaries from Seth Klarman, Greenblatt, and Marks add enormous value
  • Areas for Improvement

  • Written in 1934 with Depression-era examples requiring translation
  • Not for beginners; requires comfort with financial statements and accounting
  • 800 pages is a genuine commitment
  • Some sections are now largely historical (railroad bond analysis, utility regulation)
  • Technology companies cannot be valued using the asset-focused framework

  • Who Should Read This Book

  • Finance and MBA students studying investment analysis
  • Professional analysts who want to understand where their tools came from
  • Serious value investors who have mastered The Intelligent Investor
  • Anyone serious about individual security analysis as a profession or serious hobby
  • Probably Not For

  • Casual investors (read The Intelligent Investor instead)
  • Passive index investors
  • Anyone early in their investing education
  • Growth investors focused on technology (limited applicability)

  • How to Approach Reading Security Analysis

    For most investors: Read the Introduction and Part IV (Common Stocks). Skip the railroad bond analysis. Use the 7th edition for the modern commentary.

    For serious students: Read cover to cover with a financial statements textbook nearby. Take notes. Apply the frameworks to real companies.

    For professionals: Study the bond safety criteria and earnings quality sections especially. These remain among the most rigorous treatments available.


    Frequently Asked Questions

    Q: Should I read this before or after *The Intelligent Investor*?

    A: After. The Intelligent Investor is Graham's translation of Security Analysis into plain English for individual investors. Read it first, then return to Security Analysis when you want the full analytical framework.

    Q: Which edition should I buy?

    A: The 7th edition (2022) for the modern commentary. If budget is a concern, the 6th edition (2009) is also excellent. Avoid editions older than the 6th.

    Q: Is Graham's net-net approach still viable?

    A: In U.S. large caps, rarely. In U.S. micro-caps, occasionally. In Japan, South Korea, and certain other markets, it works regularly because asset-heavy companies often trade at discounts. Several value funds explicitly target international net-nets.


    Final Verdict

    Rating: 4.6/5

    Security Analysis is not for everyone, but for the serious student of investing it is irreplaceable. The intellectual framework it established for analyzing securities is the foundation upon which every subsequent development in fundamental analysis was built. Read it as a graduate text, not a casual guide, and it will transform your understanding of what investment analysis actually means.

    Get Your Copy

    Hardcover (7th Edition): Buy on Amazon

    Hardcover (6th Edition): Buy on Amazon

    Prices current as of publication date. Free shipping available with Prime.

    Topics

    #book-review#benjamin-graham#david-dodd#security-analysis#fundamental-analysis#value-investing#professional-investing

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