What is *The Intelligent Investor* by Benjamin Graham about?

*The Intelligent Investor* outlines principles of value investing, teaching readers to analyze stocks based on intrinsic value rather than market fluctuations. Benjamin Graham emphasizes long-term strategies, risk management through diversification, and psychological discipline to avoid speculative behavior. The book introduces foundational concepts like "Mr. Market" and "margin of safety," advocating for a methodical approach to building wealth.

Who should read *The Intelligent Investor*?

This book is essential for long-term investors seeking to minimize risk and make informed decisions using proven value-investing frameworks. It’s particularly valuable for those interested in understanding market psychology, historical financial patterns, and Warren Buffett’s intellectual roots. New and experienced investors alike benefit from its timeless advice on avoiding emotional trading.

Is *The Intelligent Investor* worth reading in 2025?

Yes—its principles remain relevant for navigating modern markets, including volatility from economic shifts and technological disruptions. Graham’s focus on fundamental analysis and disciplined investing provides a counterbalance to short-term trading trends. Updated editions with Jason Zweig’s commentary bridge classic ideas to contemporary examples.

What is value investing according to Benjamin Graham?

Value investing involves identifying undervalued stocks by analyzing a company’s assets, earnings, and dividends relative to its market price. Graham advises buying diversified groups of such stocks and holding them until prices reflect intrinsic value, a strategy he demonstrated outperformed speculative approaches over decades.

What is the "Mr. Market" analogy in *The Intelligent Investor*?

"Mr. Market" symbolizes daily stock price volatility, acting as an emotional business partner offering irrational buy/sell prices. Investors should ignore his mood swings and focus on underlying business value. This metaphor teaches the importance of separating market noise from rational decision-making.

How does *The Intelligent Investor* define a "margin of safety"?

A "margin of safety" means purchasing stocks at prices significantly below their calculated intrinsic value to buffer against errors or market downturns. Graham stresses this principle to reduce risk and ensure profitability even if future earnings estimates prove overly optimistic.

What are the key differences between investors and speculators in Graham’s view?

Investors analyze fundamentals, prioritize capital preservation, and adopt a long-term horizon. Speculators chase short-term gains, rely on market timing, and treat stocks as gambling instruments. Graham warns speculators often suffer severe losses during market corrections.

How does *The Intelligent Investor* approach dividend-paying stocks?

Graham recommends dividend-paying stocks as a stability anchor, providing consistent returns regardless of price fluctuations. He advises favoring companies with a long history of reliable dividends, as they often indicate financial health and disciplined management.

賢明なる投資家

バリュー投資の決定版

ベンジャミン・グレアム

4.24(146996 Reviews)

Finance & Economics

『賢明なる投資家』の概要

ウォーレン・バフェットのキャリアを変えたバリュー投資の聖典。グラハムが説く「ミスター・マーケット」の心理に関する不朽の知恵は、混乱する市場の中で何世代もの投資家を導いてきました。それは、天才的な知能指数は必要なく、感情の規律と、市場の愚行を富へと変える枠組みこそが重要であることを証明しています。

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第1章

The Financial Bible That Transformed Warren Buffett's Life

When a 19-year-old Warren Buffett first picked up "The Intelligent Investor," he couldn't have known this single book would become the foundation of his legendary investing career. "I still consider it the best investment book ever written," Buffett later wrote, explaining that Graham's principles provided the intellectual framework that would guide his decisions for decades. This unassuming volume, first published in 1949, has sold over a million copies and been translated into countless languages. Unlike flashy get-rich-quick schemes, Graham's approach is methodical and disciplined-perhaps why Charlie Munger called it "a roadmap for investing that I have now been following for 57 years." Even today, in an era of high-frequency trading and artificial intelligence, the book's fundamental principles remain startlingly relevant, offering timeless wisdom for navigating financial markets that continue to be driven by the same human emotions of fear and greed that Graham observed nearly a century ago.

第2章

The Crucial Distinction Between Investment and Speculation

Benjamin Graham begins with a fundamental distinction that forms the cornerstone of his investment philosophy: the difference between investing and speculation. This distinction isn't merely semantic-it's essential to developing the right mindset for long-term financial success. True investment, according to Graham, requires three elements: thorough analysis, safety of principal, and adequate return. Anything else is speculation. The irony Graham points out is how these terms have been corrupted over time. During the Great Depression, when stocks were genuinely cheap and represented true investment opportunities, they were widely considered "gambles." Yet by the late 1960s, after prices had risen dramatically, these same securities were being labeled "investments" despite carrying far greater risk. "The investor's chief problem-and even his worst enemy-is likely to be himself," Graham warns. This psychological insight recognizes our tendency to follow the crowd rather than maintain independent judgment. When markets soar, we're tempted to abandon caution; when they plunge, we panic and sell at the worst possible moment. Graham isn't categorically against speculation-he acknowledges it can be enjoyable and occasionally profitable. The danger comes when we speculate while thinking we're investing, when we speculate without proper knowledge, or when we risk more than we can afford to lose. These distinctions become particularly important during market extremes. Consider the dot-com bubble of the late 1990s. Investors poured money into companies with no earnings and often no viable business models, convinced they were "investing" in the future. One telling example was Priceline.com, which spent $67 million entering the grocery and gasoline business only to abandon both ventures shortly thereafter. This wasn't investment by Graham's definition-it was pure speculation masquerading as forward thinking. The intelligent investor must develop emotional discipline to resist these market swings. As Buffett later put it, expanding on Graham's teaching: "Be fearful when others are greedy, and greedy when others are fearful." This contrarian stance isn't natural or easy-it requires both intellectual understanding and emotional control. But Graham insists this discipline is more important than intellectual brilliance. Even Isaac Newton, arguably history's greatest scientific mind, lost a fortune (equivalent to over $3 million today) speculating in the South Sea Company after initially making a profit and then getting swept up in market enthusiasm. Graham's solution is developing an investment policy appropriate to your circumstances and temperament, then sticking to it regardless of market conditions. This means accepting that you cannot reliably predict market movements and instead focusing on finding value in individual securities.

聴きながら、すべての言葉を目で追えます

『賢明なる投資家』の一語一語が音声に合わせてリアルタイムでハイライトされ、自然に読み進められます。

第3章

The Defensive Investor's Blueprint for Success

For the majority of investors who lack the time, expertise, or emotional temperament to actively manage their portfolios, Graham prescribes a defensive approach. This isn't a consolation prize-it's a deliberate strategy designed to produce satisfactory results with minimal effort and risk. The cornerstone of the defensive investor's strategy is balance between high-grade bonds and common stocks. Graham recommends maintaining between 25% and 75% in stocks, with a default allocation of 50-50 that should be adjusted only when market valuations become extreme. This balance serves multiple purposes: it provides stability during market downturns, generates income through dividends and interest, offers some inflation protection, and creates opportunities to rebalance when markets move significantly. "The rate of return sought should be dependent on the amount of intelligent effort the investor is willing and able to bring to bear on his task," Graham explains. The defensive investor accepts that they'll likely achieve returns comparable to the overall market-which historically have been quite satisfactory over long periods. For the stock portion of the portfolio, Graham provides four clear rules: 1. Adequate diversification with 10-30 different issues 2. Selection of large, prominent, conservatively financed companies 3. Companies with long histories of dividend payments (at least 20 years) 4. Price limitations: no more than 25 times average earnings over the past seven years, and no more than 20 times last year's earnings These criteria naturally excluded most "growth stocks" of Graham's era, which he viewed as too speculative for defensive investors. Consider IBM, which Graham called "the most spectacular of all common-stock investments" through 1961. Despite its excellence as a business, IBM's stock lost 50% of its value twice in the decade following (1961-62 and 1969-70). This volatility demonstrates why even the highest quality growth stocks can be dangerous when purchased at excessive prices. For the bond portion, Graham recommends high-grade corporate or tax-free municipal bonds, U.S. savings bonds, or Treasury securities. The choice between taxable and tax-free bonds should be based on your tax bracket, while the decision on maturity length depends on your personal preference for stability versus yield. Graham also advocates dollar-cost averaging-investing fixed sums at regular intervals regardless of market conditions. This approach prevents the psychological error of buying most heavily at market peaks and selling during declines. Studies showed this strategy produced profits in all 23 ten-year periods tested. What's remarkable about Graham's defensive approach is how well it has stood the test of time. A simple portfolio of index funds following his allocation guidelines would have outperformed the vast majority of actively managed funds over the past several decades. The defensive investor's greatest advantage is psychological-by accepting that they cannot beat the market through clever timing or stock selection, they avoid the costly mistakes that plague more aggressive investors.

第4章

The Enterprising Investor's Path to Superior Returns

For those willing to dedicate substantial time and effort to investment research, Graham outlines an "enterprising" approach aimed at achieving better-than-average results. However, he cautions that this path requires not just intelligence but specialized knowledge, emotional discipline, and business acumen equivalent to that needed for running a successful company. "The enterprising investor should start with the same portfolio as the defensive investor," Graham advises. This creates a stable foundation before venturing into more specialized opportunities. From this base, Graham identifies three promising approaches for the enterprising investor: First, focusing on "relatively unpopular large companies" offers perhaps the most reliable path to above-average returns. These are substantial businesses experiencing temporary difficulties or investor neglect. Graham's research showed that buying the cheapest stocks in the Dow Jones Industrial Average (those with the lowest price-to-earnings ratios) outperformed the index in 25 of 34 test periods. A $10,000 investment in these unpopular stocks, switched yearly according to the principle, would have grown to $66,900 by 1962, versus only $25,300 for high-multiplier stocks. This approach works because large companies typically have the resources to survive adversity and return to profitability, while market sentiment eventually recognizes improvements. Consider the case of American Express after the 1963 "salad oil scandal," when the company's stock plunged due to potential liability for millions in fraudulent loans. Warren Buffett, applying Graham's principles, recognized that American Express's fundamental business remained strong despite this temporary setback, and invested heavily at depressed prices. Second, Graham recommends purchasing genuine bargains-companies selling significantly below their intrinsic value. The most identifiable bargains are stocks selling below their net working capital after deducting all obligations. A 1957 study of 85 such stocks showed a 75% two-year gain versus 50% for the S&P industrials, with virtually no significant losses. Graham notes that secondary companies (smaller firms not leading their industries) often become bargains because investors irrationally prefer industry leaders. While these companies may never achieve spectacular growth, they typically continue operating indefinitely, earning fair returns despite market neglect. Third, "special situations" or "workouts" offer opportunities for those with specialized knowledge. These include corporate reorganizations, mergers, spin-offs, and liquidations where securities are temporarily mispriced due to institutional constraints or investor confusion. The opportunity stems from the market's tendency to undervalue securities involved in complex legal proceedings, following the old Wall Street motto "Never buy into a lawsuit." Graham cautions against several common pitfalls for enterprising investors. Attempting to time the market by moving in and out based on predictions has proven unreliable even for professionals. Similarly, chasing popular growth stocks typically leads to disappointment, as studies showed investment funds specializing in growth stocks achieved only 108% gains for 1961-1970 versus 105% for the S&P composite. Most importantly, Graham warns against the middle ground-being neither truly defensive nor properly enterprising. "The investor cannot hope for both unusually good performance and freedom from investment cares," he explains. Those unwilling to dedicate substantial time and expertise to security analysis should accept the defensive approach rather than dabbling unsuccessfully in more active strategies.

『賢明なる投資家』をもっと深く楽しむ

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第5章

Mr. Market: Your Servant, Not Your Master

Perhaps Graham's most brilliant and enduring insight is his personification of market fluctuations as "Mr. Market"-an obliging but manic-depressive business partner who offers to buy your interest or sell you his each day at prices that reflect his emotional state rather than underlying business realities. "The investor who permits himself to be stampeded or unduly worried by unjustified market declines in his holdings is perversely transforming his basic advantage into a basic disadvantage," Graham writes. The true investor should view market quotations as opportunities to buy advantageously when prices fall substantially below value, or to sell when they rise well above it-not as judgments on the value of their holdings. This perspective represents a profound psychological shift. Rather than being controlled by market movements, the intelligent investor uses them selectively for their own benefit. When the market plunged in 2008-2009, most investors panicked and sold, locking in permanent losses. Those who followed Graham's principles recognized the situation as a buying opportunity and acquired excellent businesses at bargain prices. Graham illustrates this principle with the example of the Great Atlantic & Pacific Tea Company (A&P). In 1938, the company's shares fell to $36, valuing the entire business at just $126 million despite having net current assets of $134 million. Essentially, investors could buy the business for less than its working capital, receiving its fixed assets and established business position for free. By 1939, the shares had rebounded to $11712, more than tripling in value. The same company demonstrated the opposite extreme in 1961, when its stock reached a split-adjusted equivalent of $705 per share, trading at an unjustified 30 times earnings. This optimism proved completely wrong as earnings subsequently declined, and the stock fell by more than half the following year, eventually reporting its first quarterly deficit by 1972. This history demonstrates two key insights: first, that the market often makes serious errors that alert investors can exploit; second, that businesses change in quality over time, requiring periodic evaluation by investors. Graham emphasizes that market fluctuations should be expected and prepared for, both financially and psychologically. The DJIA's behavior from 1964 to 1971-advancing from 890 to 995, falling to 631, then recovering to 940-reflects what likely happened to conservative portfolios during that period. Investors should prepare for most holdings to advance 50% from lows and decline one-third from highs over five-year periods. This perspective transforms the market from a source of anxiety to a source of opportunity. As Buffett later elaborated: "Look at market fluctuations as your friend rather than your enemy; profit from folly rather than participate in it." The intelligent investor doesn't need daily market quotations any more than a homeowner needs daily appraisals of their house-they're relevant only when you plan to take action.

第6章

The Margin of Safety: The Intelligent Investor's Secret Weapon

If there's a single concept that encapsulates Graham's investment philosophy, it's the principle of "margin of safety." This represents the buffer between what you pay for an investment and what it's worth-the larger this buffer, the greater your protection against error, bad luck, or the vicissitudes of time. "The margin of safety is the difference between the percentage rate of the earnings on the stock at the price you pay for it and the rate of interest on bonds," Graham explains. In other words, if high-grade bonds yield 4% and a stock is priced to yield 7% on expected earnings, the 3% difference represents your margin of safety. This principle applies across investment types. For bonds, it means demanding coverage of interest payments several times over by company earnings. For common stocks, it means purchasing at prices well below conservative estimates of intrinsic value. The margin doesn't guarantee against loss in individual cases, but across a diversified portfolio, it dramatically improves the odds of satisfactory results. Graham illustrates this with a powerful analogy to bridge engineering. A bridge designed to support 30-ton trucks must be built to handle much more weight to account for extraordinary circumstances like hurricanes or unexpected structural weaknesses. Similarly, investments should be purchased with enough margin to withstand unforeseen adversities. The margin of safety concept explains why Graham was so insistent on price discipline. Even the finest company becomes a poor investment if purchased at too high a price. Conversely, a mediocre business can be an excellent investment if acquired cheaply enough. This principle was dramatically demonstrated during the dot-com bubble's collapse. Companies like Cisco Systems, valued at $548 billion in March 2000 (219 times earnings), lost three-quarters of their value over the next two years. Meanwhile, unglamorous companies like Sysco Corp. (the food distributor), which traded at just 26 times earnings, gained 56% during the same period. Even more striking was the contrast between Yahoo! and Yum! (the former PepsiCo division running KFC, Pizza Hut, and Taco Bell). In late 1999, Yahoo! traded at 3,264 times earnings with a $114 billion market value, while Yum! generated 17 times Yahoo!'s revenue and earned $633 million yet was valued at just $5.9 billion (1/19 of Yahoo!'s market cap). From 2000 through 2002, Yum!'s stock rose 25.4% while Yahoo!'s lost 92.4%. The margin of safety principle provides both intellectual and emotional benefits. Intellectually, it acknowledges the inherent uncertainty in all investment projections. Rather than requiring precise forecasts of future earnings, it demands a purchase price low enough that even disappointing results can still produce satisfactory returns. Emotionally, it provides confidence during market declines, as the investor knows their holdings were purchased with a substantial cushion against adversity. Graham concludes that "investment is most intelligent when it is most businesslike." This means applying the same principles successful businesses use: knowing your field thoroughly, not delegating critical decisions without proper supervision, demanding concrete evidence of safety, and having the courage of your convictions.

聴きながら、すべての言葉を目で追えます

『賢明なる投資家』の一語一語が音声に合わせてリアルタイムでハイライトされ、自然に読み進められます。

第7章

The Investor's Relationship with Management and Dividends

Graham devotes considerable attention to the relationship between shareholders and company management, acknowledging the inherent tension between these groups. While shareholders theoretically control companies through voting rights, in practice they typically behave passively, rubber-stamping management recommendations. "The idea that stockholders should have more power over their corporate agents is an old one," Graham notes, "but the machinery for such control is still primitive and practically ineffective." This observation remains largely true today, despite the growth of institutional investors and activist hedge funds. Graham suggests two fundamental questions shareholders should address: "Is the management reasonably efficient?" and "Are the interests of the average outside shareholder receiving proper recognition?" The first can be evaluated by comparing profitability and competitiveness against similar firms. The second requires examining dividend policies, capital allocation decisions, and executive compensation. Regarding dividends, Graham observes a significant shift in investor attitudes. Historically, financially weak companies retained earnings out of necessity, while strong companies paid out 60-75% of profits as dividends. By the 1970s, strong growth companies deliberately minimized dividends with investor approval, arguing that reinvested earnings would create greater shareholder value through capital appreciation. Graham criticizes "niggardly" dividend policies, particularly when underperforming companies retain earnings for expansion. He argues this is "illogical on its face" and requires thorough explanation, as there's no reason to believe shareholders will benefit from expansion by mediocre management with poor results. Research confirms Graham's skepticism. Studies show that companies paying higher dividends actually demonstrate better future earnings growth. One study found earnings growth averaged 3.9 percentage points higher when dividends were high versus when they were low. Graham also addresses stock buybacks, which have become increasingly common since his time. While theoretically beneficial to shareholders by reducing shares outstanding and increasing earnings per share, buybacks are often executed at inflated prices or used primarily to offset dilution from executive stock options. Oracle exemplifies this pattern, spending $5.3 billion (52% of annual revenue) buying back shares at $18.26 that had been issued to insiders at $3.53. The intelligent investor should be particularly wary of excessive executive compensation, especially when disconnected from company performance. Graham would likely be appalled by modern CEO pay packages that can reach hundreds of millions of dollars regardless of results. Graham's solution was independent directors with wide business experience who would submit separate annual reports directly addressing whether the business is showing appropriate results for outside shareholders. This suggestion remains revolutionary today-imagine if directors had to justify dividend policies, share repurchases, and executive compensation directly to shareholders in plain language.

第8章

The Perils of Institutional Investment

Graham devotes significant attention to investment funds, which had already become a substantial industry by the 1970s with 383 SEC-registered funds holding $54.6 billion in assets. His analysis remains remarkably relevant today, as many of the same structural issues continue to plague institutional investors. "The average fund investor has likely fared better than direct stock purchasers," Graham acknowledges, "even though fund performance roughly matches the broader market and despite higher investment costs." This advantage comes primarily because fund investors avoid the dangers of speculative new offerings and brokerage-account temptations. However, Graham identifies several fundamental problems with institutional investment. First, the sheer size of funds makes it nearly impossible for them to significantly outperform the market. As a group, professional managers collectively determine market movements-they cannot all be above average. Second, the "performance" culture creates perverse incentives. Funds that achieve spectacular short-term results attract massive inflows, but this success typically can't be sustained. Graham examines performance funds after their spectacular 1967 results and finds a poor picture: including 1967, only one "Money Manager" outperformed the S&P composite index, three did distinctly worse, and six performed similarly. Third, fund managers face institutional constraints that individual investors don't. They must buy the biggest stocks due to their large portfolios; they receive cash inflows during market rises forcing them to buy at high prices; they may need to sell during downturns to meet redemptions; they obsess over benchmark performance; and they're restricted to specific investment categories. Graham's analysis of mutual funds versus closed-end investment companies (which trade on exchanges at prices that can differ from their net asset values) remains particularly insightful. He notes that mutual funds typically sell at a 9% premium above net asset value (covering sales commissions), while most closed-end shares trade at discounts to their asset value. This pricing difference yields a clear rule for investors: buy closed-end shares at a 10-15% discount from asset value rather than paying a 9% premium for open-end shares. With similar future dividends and asset value changes, closed-end shares provide about one-fifth more value. Graham's skepticism about fund managers' ability to beat the market anticipated the index fund revolution by several years. Today's intelligent investors can implement Graham's principles through low-cost index funds that provide broad diversification without the excessive fees and underperformance that plague actively managed funds.

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第9章

The Superinvestors of Graham-and-Doddsville

While Graham himself was modest about his influence, his most famous disciple, Warren Buffett, documented the remarkable success of investors who followed Graham's value-oriented approach. In a now-famous 1984 speech at Columbia University, Buffett presented the track records of nine investment managers who had studied under Graham or applied his principles. These "superinvestors of Graham-and-Doddsville" achieved extraordinary results over long periods. Walter Schloss, a direct Graham student, generated 21.3% annual returns over 28 years versus 8.4% for the S&P 500. Tweedy, Browne Inc. averaged 20% annual returns over 16 years. Buffett's own partnership achieved 29.5% annual returns over 13 years before he dissolved it to focus on Berkshire Hathaway. What made these results particularly significant was that they came from investors with different personalities, working independently, selecting different securities, yet all applying Graham's fundamental principles. As Buffett noted, "The common intellectual theme of the investors from Graham-and-Doddsville is this: they search for discrepancies between the value of a business and the price of small pieces of that business in the market." This contradicted the efficient market hypothesis gaining academic popularity at the time, which suggested that no investment strategy could consistently beat the market. The superinvestors' success demonstrated that disciplined value investing based on Graham's principles could indeed produce superior returns. Buffett concluded his defense of value investing by noting that despite the principles being public knowledge for 50 years since Graham and Dodd wrote "Security Analysis," he'd seen no trend toward value investing in his 35 years of practice. He observed a "perverse human characteristic that likes to make easy things difficult," with academia actually moving away from teaching value investing over the past three decades. This paradox-that widely available investment principles continue to work despite being publicly known-stems from the emotional difficulty of applying them consistently. As Graham emphasized throughout his work, successful investing requires not just intellectual understanding but emotional discipline. The superinvestors succeeded not because they possessed secret knowledge, but because they had the temperament to apply Graham's principles with patience and consistency when others were swept up in market emotions.

第10章

Timeless Wisdom in a Changing World

What makes "The Intelligent Investor" truly remarkable is how well its core principles have endured despite dramatic changes in the financial landscape. When Graham wrote his final revision in 1973, computers were room-sized machines used only by the largest institutions, information traveled slowly, trading required physical stock certificates, and the entire financial industry was far less sophisticated. Yet the fundamental challenges investors face remain unchanged: separating emotion from reason, avoiding speculative excess, finding value in a noisy marketplace, and maintaining discipline through market cycles. Graham's insights into human psychology and market behavior have proven more durable than specific valuation metrics or security selection techniques. "The investor's chief problem-and even his worst enemy-is likely to be himself," Graham wrote. This insight has been confirmed by modern behavioral finance research, which documents how cognitive biases lead investors to buy high and sell low. Studies show mutual fund investors underperformed their own funds by 4.7 percentage points annually from 1998-2001 simply by buying high and selling low. Graham's emphasis on margin of safety anticipated modern risk management approaches. His insistence on diversification has been validated by portfolio theory. His distinction between investment and speculation provides a framework for evaluating new financial products and strategies. Even Graham's apparent failures contain valuable lessons. His hope that shareholders would become more active in corporate governance seemed quixotic in his lifetime, yet the rise of institutional investors and activist funds has moved corporate America closer to his vision. His skepticism about growth stocks seemed overly conservative during the great bull markets of the 1980s and 1990s, yet was vindicated by the subsequent crashes. The intelligent investor today can implement Graham's principles using tools he never imagined-index funds, ETFs, online screening tools, and instantaneous information access. Yet the core approach remains unchanged: thorough analysis, emotional discipline, and insistence on a margin of safety. As Graham wrote in his final chapter, "Investment is most intelligent when it is most businesslike." This simple statement encapsulates his entire philosophy-approaching the market not as a casino or a predictor of short-term price movements, but as a venue for purchasing partial ownership in real businesses at reasonable prices. In a world of increasingly complex financial instruments and high-speed trading, Graham's approach offers something precious: a sustainable, comprehensible path to financial security. The intelligent investor doesn't need to outguess the market or discover the next Amazon-they simply need the patience to buy value when it's available and the discipline to avoid speculation when it's not.

★★★★★

『賢明なる投資家』を最後まで読み終えました

100万人以上の学習者に愛用されています

“23日間、毎日使い続けています。今では日課の一部です。”

jayallen

『賢明なる投資家』の主要テーマ

value investing
margin of safety
market psychology
defensive asset allocation
investment versus speculation

『賢明なる投資家』の名言

The intelligent investor is a realist who sells to optimists and buys from pessimists.
The stock market is a Manic-Depressive.
Those who do not remember the past are condemned to repeat it.
The investor's chief problem-and even his worst enemy-is likely to be himself.

『賢明なる投資家』の登場人物

Benjamin GrahamAuthor and father of value investing

著者について

『賢明なる投資家』（The Intelligent Investor）の著者であるベンジャミン・グレアム（1894–1976）は、「バリュー投資の父」として、また現代財務分析の基礎を築いた人物として広く称賛されています。ロンドンに生まれ、ニューヨークで育ったグレアムの専門知識は、ウォール街の投資家、コロンビア大学教授、そして体系的な証券分析の先駆者としての数十年にわたる経験から培われました。デビッド・ドッドとの共著である『証券分析』（Security Analysis）や『賢明なる投資家』を含む彼の独創的な著作は、「安全域（margin of safety）」、「本質的価値（intrinsic value）」、そして「感情の規律」といった核心的な原則を確立しました。これらはバリュー投資の礎石として、今日でも世界の市場に影響を与え続けています。

グレアムの手法は、彼を最大の師と仰ぐウォーレン・バフェットなどの門下生を通じて、不朽の評価を得ました。コロンビア大学を卒業し、投資ファンド「グレアム＝ニューマン」を設立した彼は、投機よりもデータに基づいた意思決定を提唱することで、金融理論を変革しました。投資以外でも、グレアムは影響力のあるエッセイを執筆し、財務計算機の特許を取得し、コロンビア大学の講義を通じて何世代ものアナリストを育成しました。

『賢明なる投資家』は現在もウォール街の古典であり続け、100万部以上を売り上げ、15以上の言語に翻訳されています。その改訂版は、現代の市場に対応しつつもグレアム本来の枠組みを維持しており、世界中の投資家にとって不可欠な必読書としての地位を揺るぎないものにしています。

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This learning plan transforms beginners and intermediate investors into confident, intelligent decision-makers by combining timeless investment principles with modern portfolio theory and behavioral science. It's ideal for anyone who wants to move beyond reactive trading and build sustainable wealth through disciplined, strategic investing grounded in proven frameworks used by the world's most successful investors.

3 h 45 m•4 セクション

学習プラン

Investing & history

This learning plan bridges timeless investment wisdom with practical portfolio construction skills, essential for anyone seeking to build lasting wealth through markets. It's ideal for aspiring investors, finance professionals, or anyone managing their own retirement accounts who wants to move beyond surface-level knowledge and understand both the principles and historical context that separate successful long-term investors from speculators.

3 h 28 m•4 セクション

学習プラン

The Munger Latticework: Worldly Wisdom for Better Decisions

This plan distills Charlie Munger’s philosophy into actionable strategies for navigating complex systems. It is essential for investors, strategists, and leaders who want to avoid cognitive biases and build wealth through rational, multidisciplinary thinking.

1 h 27 m•3 セクション

学習プラン

The Boring Path to Wealth

Wealth creation is often less about brilliant stock picking and more about avoiding catastrophic mistakes and staying disciplined. This plan is designed for individuals seeking a reliable, low-stress strategy to achieve financial independence using proven index fund principles.

1 h 30 m•3 セクション

学習プラン

Profit from stock investments

This learning plan provides a comprehensive path from stock market beginner to sophisticated investor, combining timeless principles from investing legends with modern analytical tools. It's ideal for anyone seeking to build lasting wealth through stock investments—whether you're starting from scratch, looking to formalize your self-taught knowledge, or wanting to upgrade from passive index investing to active stock selection with proven strategies.

4 h 4 m•4 セクション

学習プラン

Learn to profit in the stock market

This plan bridges the gap between fundamental analysis and technical execution, providing a holistic approach to wealth creation. It is ideal for aspiring investors who want to combine the wisdom of value investing with the precision of market timing and disciplined portfolio management.

4 h 40 m•4 セクション

コロンビア大学卒業生がサンフランシスコで開発

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@Chloe, Solo founder, LA

117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum

108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC

254

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful

4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon

201

"It is great for me to learn something from the book without reading it."

@OojasSalunke

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn

483

"Makes me feel smarter every time before going to work"

@Cashflowbubu

BeFreedがウェブ上でどのように話題になっているかをもっと見る

コロンビア大学卒業生がサンフランシスコで開発

LOVED BY

1,000,000+ curious minds.

4.7

avg rating

1M+ learners

"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."

@Moemenn

"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

@Chloe, Solo founder, LA

117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum

108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC

254

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful

4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon

201

"It is great for me to learn something from the book without reading it."

@OojasSalunke

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn

483

"Makes me feel smarter every time before going to work"

@Cashflowbubu

"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."

@Moemenn

"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

@Chloe, Solo founder, LA

117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum

108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC

254

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful

4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon

201

"It is great for me to learn something from the book without reading it."

@OojasSalunke

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn

483

"Makes me feel smarter every time before going to work"

@Cashflowbubu

"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."

@Moemenn

"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

@Chloe, Solo founder, LA

117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum

108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC

254

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful

4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon

201

"It is great for me to learn something from the book without reading it."

@OojasSalunke

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn

483

"Makes me feel smarter every time before going to work"

@Cashflowbubu

BeFreedがウェブ上でどのように話題になっているかをもっと見る

今すぐ学習の旅を始めよう

第4章

賢明なる投資家

概要『賢明なる投資家』の概要

1冊の本。さまざまな聴き方。

The Financial Bible That Transformed Warren Buffett's Life

The Crucial Distinction Between Investment and Speculation

聴きながら、すべての言葉を目で追えます

The Defensive Investor's Blueprint for Success

The Enterprising Investor's Path to Superior Returns

『賢明なる投資家』をもっと深く楽しむ

Mr. Market: Your Servant, Not Your Master

The Margin of Safety: The Intelligent Investor's Secret Weapon

聴きながら、すべての言葉を目で追えます

The Investor's Relationship with Management and Dividends

The Perils of Institutional Investment

『賢明なる投資家』をもっと深く楽しむ

The Superinvestors of Graham-and-Doddsville

Timeless Wisdom in a Changing World

『賢明なる投資家』を最後まで読み終えました

『賢明なる投資家』の主要テーマ

『賢明なる投資家』の名言

『賢明なる投資家』の登場人物

著者について

賢明なる投資家の要約をダウンロード

他のユーザーのお気に入り

この本に関するよくある質問

What is The Intelligent Investor by Benjamin Graham about?

Who should read The Intelligent Investor?

Is The Intelligent Investor worth reading in 2025?

What is value investing according to Benjamin Graham?

もっと見る

1,000,000+ curious minds.

1,000,000+ curious minds.

1冊の本。さまざまな聴き方。

The Financial Bible That Transformed Warren Buffett's Life

The Crucial Distinction Between Investment and Speculation

聴きながら、すべての言葉を目で追えます

The Defensive Investor's Blueprint for Success

The Enterprising Investor's Path to Superior Returns

『賢明なる投資家』をもっと深く楽しむ

Mr. Market: Your Servant, Not Your Master

The Margin of Safety: The Intelligent Investor's Secret Weapon

聴きながら、すべての言葉を目で追えます

The Investor's Relationship with Management and Dividends

The Perils of Institutional Investment

『賢明なる投資家』をもっと深く楽しむ

The Superinvestors of Graham-and-Doddsville

Timeless Wisdom in a Changing World

『賢明なる投資家』を最後まで読み終えました

他のユーザーのお気に入り

もっと見る

『賢明なる投資家』の概要