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Modern Portfolio Theory explained: A guide for investors

  • Harry Markowitz developed Modern Portfolio Theory in the 1950s, establishing a mathematical framework for investment decision-making.
  • He created MPT to quantify the relationship between risk and return, based on the principle that higher returns require accepting higher risk.
  • MPT distinguishes systematic risk, affecting the whole market, from unsystematic risk, which investors can reduce through diversification across assets.
  • The efficient frontier, as described by modern portfolio theory, consists of portfolios that achieve the maximum possible return for each level of risk, thus providing an optimal balance between risk and reward.
  • Although MPT revolutionized investing and earned Markowitz a Nobel Prize, it assumes market efficiency and rational investors, which behavioral finance research often challenges.
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The Billings GazetteThe Billings Gazette
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Modern Portfolio Theory explained: A guide for investors

Range defines Modern Portfolio Theory, the mathematical framework of investment decision-making that quantifies the relationship between risk and return in financial markets, and breaks down the theory into practical insights that can be used to build a more efficient investment…

·Billings, United States
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The Billings Gazette broke the news in Billings, United States on Tuesday, June 10, 2025.
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