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Unlike many textbooks that focus solely on the Efficient Market Hypothesis (EMH), Haugen goes beyond, providing in-depth analysis of capital asset pricing, arbitrage pricing theory, and stock valuation methods. Core Concepts in Haugen’s Theory

His deep understanding of theory coexisted with a critical, reformist spirit. Haugen was a prominent critic of two central pillars of modern finance: the and the Capital Asset Pricing Model (CAPM) . His most notable challenge came from his early research, which discovered a “low volatility anomaly”—the finding that low-risk stocks often produce higher returns than their high-risk counterparts, directly contradicting core financial theories. This work earned him the unofficial title of “father of low volatility investing” and culminated in another influential work, The New Finance , which was required reading for the Chartered Financial Analyst (CFA) exam. This unique perspective—a profound grasp of the rules and a keen eye for their exceptions—makes Modern Investment Theory an exceptionally balanced and insightful work.

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