Reading with AI · Series
The Intelligent Investor
Book one of the "Reading with AI" series: The Intelligent Investor by Benjamin Graham. Chapter-by-chapter breakdowns of the key ideas, with real-world examples — from the line between investing and speculation to Mr. Market and margin of safety, a complete 20-chapter guide.
5 chapters · read in order
- 01Reading with AI 01 | The Intelligent Investor: A Full-Book Map and Chapter 1 in DepthThe debut of the new "Reading with AI" column. Based on the 1973 fourth edition (with Jason Zweig's commentary), we first draw a map of all 20 chapters, then take a close read of the introduction ("The Purpose of This Book") and Chapter 1: the 1934 definition of investment vs. speculation, John Raskob's get-rich promise, why growth prospects do not equal investment profits (airlines and IBM), the defensive investor's 25%–75% rule and the Gordon equation, the two obstacles facing the enterprising investor, and the iron law that good methods decay.
- 02
Reading with AI 02 | The Intelligent Investor: Chapter 2 — The Investor and InflationUsing 55 years of data from 1915–1970, Graham demolishes the most popular conclusion of his day—that bonds are undesirable and stocks must be held in full: there is no close connection between inflation and stock earnings or prices, because inflation never actually raised the rate of return on corporate capital. He then rules out gold, collectibles, and real estate one by one, before landing back on a stocks-plus-bonds allocation as the lesser of two evils. With Jason Zweig's commentary: money illusion, three reasons inflation is not dead, stocks as only a "partial hedge," and REITs and TIPS. - 03
Reading with AI 03 | The Intelligent Investor, Chapter 3: A Century of Stock-Market History and the Level of Stock Prices in Early 1972Graham spreads out 100 years of history since 1871—19 bull-and-bear cycles along with the decade-by-decade relationships among prices, earnings, and dividends—to demonstrate how to give "is the market expensive right now" a computable answer: in 1971 the P/E ratio was actually lower than in 1963, yet the conclusion was still "unattractive"—because bond yields had overtaken the dividend yield by more than two to one. He also publishes his own report card from four judgments (1948/1953/1959/1964), including the one he got wrong. With Jason Zweig's commentary: Dow 36,000-style bull-market ravings, the survivorship bias that pulls the floor out from under "stocks always win in the long run," the Michael Jordan salary analogy, the three-factor addition, and the Shiller P/E (CAPE). - 04
Reading with AI 04 | The Intelligent Investor: Chapter 4 — Portfolio Policy for the Defensive InvestorA 50/50 stock-bond allocation with periodic rebalancing replaces emotional decisions with a math problem; the psychological hurdle of rebalancing is far harder than the arithmetic. - 05
Reading with AI 05 | The Intelligent Investor: Chapter 5 — The Defensive Investor and Common StocksThe stock/bond split is settled, so what should the stock half buy? Graham lays down four non-negotiable rules: diversify across industries with 10–30 stocks, every one of them large, prominent, and conservatively financed, with a long record of continuous dividends, and a P/E no higher than 25 on 7-year average earnings. The fourth rule sweeps every hottest growth stock of the day out of the portfolio in one stroke—because they demand you get three things right in a row, and Texas Instruments' stock rose 5× as fast as its earnings, then fell 80% when earnings fell 50%; Cisco replayed it verbatim thirty years later. Plus the classic definition that "fluctuation is not risk, but overpaying is," three case studies (the widow, the doctor, and the young person), and Jason Zweig's blistering takedown of "buy what you know": Barbra Streisand's Starbucks, the Legg Mason Value Trust fund (Bill Miller) down 73.2%, Enron employees' retirement savings, and three sets of numbers on home bias.