The next morning, she ignored her syllabus. She pulled up 20 years of data on the S&P 500, sorting stocks not by beta, but by sheer price turbulence. The quiet ones—utilities, consumer staples, boring dividend payers—had crushed the high-flying tech darlings over three decades, with half the drawdowns.
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By understanding and applying the principles of Modern Investment Theory, investors can make more informed investment decisions, manage risk more effectively, and achieve their long-term financial goals.
The central thesis of Haugen's work is that while models like the Capital Asset Pricing Model (CAPM) and Arbitrage Pricing Theory (APT) are essential for understanding risk, they often fail to account for the persistent inefficiencies found in real-world markets.