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Measuring Investment Skill in Multi-Asset Strategies: An Empirical Study of the Information Coefficient as Weighted Rank Correlation

Steve Q. Xia and Joseph Simonian
The Journal of Portfolio Management Multi-Asset Special Issue 2021, jpm.2021.1.208; DOI: https://doi.org/10.3905/jpm.2021.1.208
Steve Q. Xia
is a senior managing director at Guardian Life in New York, NY, and a professor of the practice of finance at Brandeis University.
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Joseph Simonian
is the founder and CIO of Autonomous Investment Technologies LLC in Newton, MA.
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Abstract

Over the past decade, the investment industry has come to appreciate the importance of asset allocation and its role in achieving clients’ financial objectives. The result has been a profound change in the landscape for the industry in terms of both product design and distribution. Increasingly, the asset flow to investment managers has been heavily driven by multi-asset funds and balanced funds rather than individual stock or bond funds. With the growing prominence of multi-asset investing, the role of active asset allocation has also become more important. For investors who are evaluating multi-asset funds and for asset allocators trying to set expected asset allocation alpha, the measurement of asset allocation skill is a crucial task. To the latter end, this article provides an intuitive methodology to measure asset allocation skill within the formal context of the fundamental law of active management, a well-known characterization of portfolio managers’ alpha generation process. Specifically, the authors show how weighted rank correlation provides an intuitive and transparent version of the information coefficient. Their study is framed within a novel simulation-based framework that they use to analyze the impact of asset allocation skill and its implications for estimating reasonable expectations of asset allocation alpha.

TOPICS: Portfolio construction, exchange-traded funds and applications, performance measurement, quantitative methods, statistical methods

Key Findings

  • ▪ Weighted rank correlation provides an intuitive and nuanced way to express the information coefficient—the relationship between ex ante and realized returns.

  • ▪ The bespoke simulation framework described in the article can provide insight into the relationship between different skill levels and expected asset allocation alpha.

  • ▪ We find that there is a near-linear relation between asset allocation skill and alpha and asset allocation skill and tracking error, but a less-than-linear relationship between asset allocation skill and information ratio and asset allocation skill and bet size. The relationship between asset allocation skill and trading frequency is found to be more or less uniform.

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The Journal of Portfolio Management: 48 (5)
The Journal of Portfolio Management
Vol. 48, Issue 5
April 2022
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Measuring Investment Skill in Multi-Asset Strategies: An Empirical Study of the Information Coefficient as Weighted Rank Correlation
Steve Q. Xia, Joseph Simonian
The Journal of Portfolio Management Jan 2021, jpm.2021.1.208; DOI: 10.3905/jpm.2021.1.208

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Measuring Investment Skill in Multi-Asset Strategies: An Empirical Study of the Information Coefficient as Weighted Rank Correlation
Steve Q. Xia, Joseph Simonian
The Journal of Portfolio Management Jan 2021, jpm.2021.1.208; DOI: 10.3905/jpm.2021.1.208
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