Savvy Nickel LogoSavvy Nickel
Ctrl+K
The Most Important Thing
Value InvestingIntermediate-Advanced

The Most Important Thing

by Howard Marks

4.8/5

Howard Marks distills 40 years of investment memos into a framework for second-level thinking, market cycles, and risk. Required reading for any serious investor who wants to understand how the best in the business actually think.

Published 2011
196 pages
11 min read
Buy on Amazon

*Disclosure: This article contains affiliate links. If you purchase through these links, we may earn a commission at no additional cost to you. We only recommend books we genuinely believe in.

Quick Overview

Howard Marks co-founded Oaktree Capital Management and has managed money through every major market cycle since the 1970s. His investor memos, sent to clients since 1990, became legendary in the investment community. The Most Important Thing distills the core ideas from those memos into a concentrated framework for intelligent investing. Warren Buffett said: "When I see memos from Howard Marks in my mail, they're the first thing I open and read. I always learn something."

Book Details

AttributeDetails
TitleThe Most Important Thing Illuminated
AuthorHoward Marks
PublisherColumbia University Press
Published2011 (Illuminated edition 2013)
Pages196
Reading LevelIntermediate to Advanced
Amazon Rating4.7/5 stars

Get Your Copy

Paperback: Buy on Amazon

Kindle: Buy on Amazon

Audiobook: Buy on Amazon


About the Author

Howard Marks founded Oaktree Capital Management in 1995 after building TCW's fixed income division into one of the largest high-yield bond managers in the world. Oaktree manages approximately $170 billion, specializing in distressed debt, high-yield bonds, and other credit markets. Marks is widely considered one of the best risk thinkers in the investment industry.

His investor memos are available free at oaktreecapital.com and represent some of the best investment writing published anywhere. This book is the organized synthesis of ideas that span those memos.


The Most Important Thing: There Is No Single One

The book's title is deliberately ironic. Marks identifies 18 "most important things," each one necessary and none sufficient on its own. His point: great investing is not a single insight but a complex of mutually reinforcing disciplines applied consistently.

The most crucial chapters:


Chapter 1: Second-Level Thinking

This is the book's central contribution and the most important concept for any serious investor.

First-level thinking: "This is a good company. I'll buy the stock."

Second-level thinking: "This is a good company, but everyone knows it's a good company, so the stock is priced as if it's a good company. What do I know that the consensus does not? Is there a scenario where the stock is still cheap despite widespread knowledge of its quality?"

Second-level thinking requires asking not just "what will happen?" but "what does the consensus expect to happen, and how does my view differ from that consensus?"

The asymmetry of second-level thinking:

ScenarioFirst-Level ResponseSecond-Level Question
Good companyBuyIs it already priced for perfection?
Bad newsSellIs the bad news already priced in and the stock now cheap?
Market upComplacencyIs optimism excessive?
Market downPanicIs pessimism excessive?

To beat the market, you must think differently from the market. Being right in the same direction as the consensus produces average returns at best. The goal is to identify situations where the consensus is wrong — and to be right when you differ.


Chapter 2: Understanding Market Efficiency (and Its Limits)

Marks occupies a nuanced middle ground between the efficient market hypothesis and active management overconfidence.

His view: Markets are largely efficient most of the time in easily analyzed segments. They are substantially less efficient in:

  • Distressed debt (fear and complexity create mispricings)
  • Small-cap equities (under-followed, limited institutional coverage)
  • Emerging markets (information asymmetry)
  • Complex credit instruments (analytical barriers limit competition)
  • The implication: Most attempts to beat the S&P 500 by picking large-cap U.S. stocks are futile because competition is fierce. Beating markets in less efficient segments is genuinely possible for skilled practitioners with informational or analytical advantages.


    Chapter 3: Value

    Marks is a value investor in the broadest sense: he buys assets for less than they are worth. But his framework goes beyond Graham's balance-sheet focus to include:

    The components of value:

    Value ComponentDescriptionMeasurable?
    Current assetsBook value, liquidation valueYes
    Current earningsP/E-based valuationYes
    Future earnings growthDCF-based intrinsic valuePartly
    Competitive position (moat)Franchise value, pricing powerQualitatively

    Marks is explicit: the relationship between price and value is the only thing that determines whether an investment is good or bad. A wonderful business at a terrible price is a bad investment. A mediocre business at a wonderful price can be an excellent investment.


    Chapter 4: The Relationship Between Price and Value

    Marks's most practical observation:

    Investment performance comes from two sources:

  • How well the underlying asset performs
  • How the market's assessment of that asset changes
  • Most investors focus entirely on source 1 (business quality). Marks argues that source 2 (valuation change) is equally important and more controllable through discipline.

    Example:

    ScenarioBusiness PerformanceValuation ChangeInvestment Return
    A+10% earnings growthP/E expands 20x to 30x+65%
    B+10% earnings growthP/E contracts 20x to 15x-17%
    C-5% earnings declineP/E expands 10x to 20x+90%

    Scenario C (declining business, expanding multiple) can produce the best returns. Scenario B (growing business, contracting multiple) can produce losses. The valuation entry point matters as much as business quality.


    Chapter 5: Understanding Risk

    Marks's treatment of risk is the most sophisticated in any mainstream investing book. His key insight: risk is not volatility (the standard academic definition). Risk is the probability of permanent capital loss.

    The conventional risk framework (academic):

    Risk = Volatility (standard deviation of returns)

    Marks's risk framework:

    Risk = Probability of permanent loss × Magnitude of potential loss

    The difference matters enormously:

    AssetVolatilityRisk of Permanent Loss
    10-year TreasuryLowVery low (if held to maturity)
    S&P 500 indexMediumLow (historically zero over 20-year periods)
    Individual growth stockHighMedium to High
    Leveraged buyout debtLow reportedHigh (principal loss if company fails)
    Distressed bonds (diversified)HighLow per position (diversification)

    A portfolio of Treasury bonds can have low volatility and high risk (inflation risk, reinvestment risk, interest rate risk over long periods). A diversified portfolio of distressed bonds can have high volatility and manageable risk. Conflating the two concepts leads to dangerously wrong decisions.

    Risk and Return: Not Always Correlated

    Marks challenges the standard model that higher risk always produces higher expected return:

    The standard model: Higher risk securities must offer higher expected returns to attract buyers.

    Marks's critique: This is true in equilibrium. But markets go out of equilibrium regularly. When investors become euphoric, they accept insufficient compensation for risk (expected return falls). When investors become terrified, they demand excessive compensation (expected return rises). The best risk-adjusted returns come from buying when others are fearful.


    Chapter 6: Recognizing Risk

    The greatest risks are usually invisible during formation and obvious only after they materialize. Marks identifies the conditions that create the most dangerous investment environments:

    The risk environment checklist:

    SignalLow RiskHigh Risk
    Investor psychologyFear, cautionEuphoria, complacency
    New issue qualityConservativeIncreasingly weak covenants
    Capital availabilityTightAbundant
    Narrative"This time may be different" is rejected"This time is different" is accepted
    ValuationsBelow historical averagesAbove historical averages
    LeverageLow in the systemHigh and growing

    When most of the "high risk" signals are present simultaneously, Marks moves toward defense. When most of the "low risk" signals are present, he moves toward offense. This is cycle awareness applied practically.


    Chapter 7: Controlling Risk

    Marks's key insight: you cannot control return, but you can control risk. This is the basis of all professional risk management.

    Risk control operates asymmetrically:

  • Good risk management is invisible in bull markets (you appear to underperform)
  • Good risk management is powerful in bear markets (you lose less and recover faster)
  • The compounding math of avoiding large losses is more powerful than chasing large gains
  • The mathematics of loss avoidance:

    ScenarioYear 1Year 22-Year Totalvs. Break Even
    Up 50%, down 50%+50%-50%-25%Need +33% to recover
    Up 25%, down 25%+25%-25%-6.25%Need +6.7% to recover
    Up 10%, down 10%+10%-10%-1%Need +1% to recover
    Up 8%, down 0%+8%0%+8%Already ahead

    The asymmetry of percentage losses explains why avoiding a 50% drawdown is worth more than generating a 50% gain. A 50% loss requires a 100% gain to break even.


    Chapter 8: Being Attentive to Cycles

    Marks views market cycles not as random fluctuations but as predictable swings driven by human psychology. Understanding where you are in the cycle is the most actionable form of market awareness.

    The credit cycle (Marks's specialty):

    Economy strengthens
    → Lenders become confident
    → Credit standards loosen
    → Weaker borrowers get credit
    → Asset prices rise
    → Defaults remain low
    → Confidence becomes complacency
    → Standards collapse
    → Weak borrowers cannot repay
    → Defaults rise
    → Lenders panic
    → Credit contracts
    → Economy weakens
    → Cycle begins again

    This cycle has repeated in roughly 7-10 year intervals throughout financial history. Marks uses awareness of where the credit cycle stands to calibrate Oaktree's aggressiveness in deploying capital.


    Chapter 9: Awareness of the Pendulum

    Perhaps Marks's most memorable metaphor: investor psychology swings like a pendulum between greed and fear, but it almost never rests at the midpoint of rationality.

    The pendulum positions:

    Extreme FearRational MidpointExtreme Greed
    Stocks are dangerousStocks have risk-adjusted valueStocks are sure things
    Nobody wants to lendCredit is available at fair pricesEveryone is lending to anyone
    Best time to buyFair time to buyWorst time to buy
    Lowest pricesFair pricesHighest prices

    The pendulum's predictability provides opportunity. You cannot know when it will swing back, but you can know which direction it will eventually move. Buying at extreme fear and reducing exposure at extreme greed has been Marks's operating philosophy for 40 years.


    The Illuminated Edition

    The 2013 illuminated edition adds commentary from four distinguished investors:

  • Joel Greenblatt on second-level thinking and formula investing
  • Paul Johnson on academic applications
  • Seth Klarman on risk and margin of safety
  • Christopher Davis on long-term equity investing
  • These commentaries add depth without disrupting the flow of Marks's text.


    Strengths & Weaknesses

    What We Loved

  • Second-level thinking concept is the most valuable single idea in any investing book
  • Risk framework separates Marks from every other mainstream author
  • Cycle awareness provides a practical lens for calibrating portfolio aggressiveness
  • Short and dense — every page contains ideas worth rereading
  • Illuminated edition commentary from Klarman and Greenblatt is outstanding
  • Areas for Improvement

  • Primarily applicable to professional investors with ability to implement sophisticated strategies
  • Distressed debt focus of Oaktree means some examples require translation to equity investing
  • Does not provide specific buy/sell criteria — more philosophy than mechanics
  • Some chapters are repetitive in their core message

  • Who Should Read This Book

  • Investors who have mastered the basics and want to think at a higher level
  • Anyone managing significant wealth who wants professional-grade risk thinking
  • Finance professionals in credit, equity, or asset allocation roles
  • Investors who want to understand how market cycles affect return expectations
  • Probably Not For

  • Complete beginners (start with Bogle or Collins)
  • Passive index investors (the framework is for active investors)
  • Those wanting specific stock recommendations

  • Comparison to Similar Books

    BookRisk DepthCycle AwarenessAccessibility
    The Most Important ThingVery HighVery HighMedium
    The Intelligent InvestorHighMediumMedium
    Margin of SafetyHighMediumLow-Medium
    The Psychology of MoneyMediumLowVery High

    Frequently Asked Questions

    Q: Should I read the regular edition or the Illuminated edition?

    A: Illuminated edition without question. The commentary from Klarman and Greenblatt alone justifies the price difference.

    Q: Are Marks's memos worth reading in addition to this book?

    A: Yes. They are free at oaktreecapital.com and represent his thinking evolving in real time through actual market events. Particularly recommended: "You Can't Predict. You Can Prepare." (2001), "The Tide Goes Out" (2007), and "Nobody Knows" (2008).

    Q: Is this book relevant for index fund investors?

    A: Partially. The chapters on market cycles, risk psychology, and the pendulum provide valuable context for understanding market conditions even if you never pick individual securities. The second-level thinking framework helps you resist the crowd behavior that destroys returns.


    Final Verdict

    Rating: 4.8/5

    The Most Important Thing is the best book on investment philosophy written by an active practitioner. It will not give you stock picks or portfolio templates. It will give you a framework for thinking about risk, value, and cycles that distinguishes intelligent investors from the majority. Every serious investor should read it after mastering the basics.

    Get Your Copy

    Paperback: Buy on Amazon

    Kindle: Buy on Amazon

    Audiobook: Buy on Amazon

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

    Topics

    #book-review#howard-marks#value-investing#risk-management#market-cycles#oaktree-capital#contrarian-investing

    Get Your Copy

    Support Savvy Nickel by purchasing through our affiliate link.

    Buy on Amazon

    Related Articles