Why a 70-Year Old Theory Still Holds the Key to Smart Investing

Photo by Stephen Foerster

An important milestone passed almost unnoticed last month when Modern Portfolio Theory, or MPT, turned seventy. It was in March 1952 when Harry…

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Stephen Foerster

Stephen Foerster

I’m a Finance prof, CFA, and author of In Pursuit of the Perfect Portfolio (with Andrew Lo). I write stories about investing. (I don’t give financial advice.)