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Stock Portfolio Alpha Definition

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 Guy R. Fleury, Independent Computer Software Professional

 Friday, September 1, 2017

To a question asked by a Quantopian forum member wanting to clarify my use of the word alpha in a stock trading strategy, I replied with: I use alpha as defined by Jensen in the late 60's. That is, as the premium return above market averages. Often also referred to as some added portfolio management skills. A portfolio's expected return can have for expression: E[F(t)] = F(0)·(1 + r_m)^t which represents some initial capital compounded over time. In the stock market, r_m is given away, almost free.


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