The Intelligent Investor

The Intelligent Investor is the most important investing book ever written. Benjamin Graham, Warren Buffett's mentor at Columbia Business School, laid out the principles of value investing that have guided the most successful investors in history for over 75 years. The book's central thesis is deceptively simple: a stock is not a ticker symbol — it is partial ownership of a real business, and it should be valued accordingly.

Graham introduced concepts that are now foundational to investing: the margin of safety (only buy when the price is significantly below intrinsic value), Mr. Market (the stock market is an emotional partner who offers you prices daily — you are free to ignore him), and the distinction between investing and speculation. These ideas were revolutionary in 1949 and remain the most reliable framework for building wealth in public markets.

Warren Buffett has called this 'by far the best book on investing ever written.' Every serious investor has read it. Those who have not are gambling, whether they know it or not. The 2003 edition, with commentary by Jason Zweig, makes Graham's 1949 wisdom accessible to modern readers while preserving the intellectual rigor that has made this book the cornerstone of value investing.