The Full Financial Toolkit of Partial Second Moments

James Ming Chen
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James Ming Chen: Michigan State University

Chapter Chapter 5 in Postmodern Portfolio Theory, 2016, pp 59-78 from Palgrave Macmillan

Abstract: Abstract Traditional, two-tailed measurements of risk-adjusted performance, particularly the Sharpe ratio, give dangerous guidance during bear markets because they implicitly assume that returns are normally distributed and because they effectively treat upside and downside volatility as equal constituents of risk.1 The danger in assuming symmetry in the distribution of returns is neither new nor mysterious. Many of the architects of modern portfolio theory nevertheless adopted this statistical shortcut in grudging acceptance of that era’s computational limitations.2 Harry Markowitz’s theoretical call “for calculating the covariances of every security” initially posed a “monumental” barrier to practical implementation: under the constraints on computing power during the 1960s, “[c]alculating a single portfolio could eat up tens of thousands of dollars in computer time.”3

Keywords: Supra Note; Systematic Risk; Portfolio Selection; Sharpe Ratio; Capital Asset Price Model (search for similar items in EconPapers)
Date: 2016
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Persistent link: https://EconPapers.repec.org/RePEc:pal:qpochp:978-1-137-54464-3_5

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DOI: 10.1057/978-1-137-54464-3_5

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