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Harry Max Markowitz (born August 24, 1927) was an influential economist and winner of the Bank of Sweden Prize in Economic Sciences in Memory of Alfred Nobel in 1990.
He is best known for his pioneering work in Modern Portfolio Theory, studying the effects of asset risk, correlation and diversification on expected investment portfolio returns.
A Markowitz Efficient Portfolio is one where no added diversification can lower the portfolio's risk for a given return expectation (alternately, no additional expected return can be gained without increasing the risk of the portfolio). The Markowitz Efficient Frontier is the set of all portfolios that will give you the highest expected return for each given level of risk. These concepts of efficiency were essential to the development of the Capital Asset Pricing Model.
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