Business and Personal Finance Dictionary

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• MODERN PORTFOLIO THEORY (MPT)
  
  An approach to quantifying risk and return in a portfolio of assets. Developed in 1959 by Harry Markowitz, MPT is the foundation for present-day principles of investment diversification. It emphasizes the portfolio rather than individual assets, and how assets perform in relation to each other based on the assumption that investors can benefit from diversification when asset class returns do not move in lock step with one another.
  
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