Volume 55, Issue 4 p. 645-668
ORIGINAL ARTICLE

Decomposing the VIX: Implications for the predictability of stock returns

K. Victor Chow

K. Victor Chow

Chambers College of Business and Economics, West Virginia University, Morgantown, West Virginia

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Wanjun Jiang

Wanjun Jiang

Guanghua School of Management, Peking University, Beijing, China

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Bingxin Li

Corresponding Author

Bingxin Li

Chambers College of Business and Economics, West Virginia University, Morgantown, West Virginia

Correspondence

Jingrui Li, GWBC, Room #640, A.B. Freeman School of Business, 7 McAlister Dr., New Orleans, LA 70118.

Email: jli61@tulane.edu

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Jingrui Li

Jingrui Li

A.B. Freeman School of Business, Tulane University, New Orleans, Louisiana

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First published: 18 August 2020
Citations: 9

Abstract

The VIX index is not only a volatility index but also a polynomial combination of all possible higher moments in market return distribution under the risk-neutral measure. This paper formulates the VIX as a linear decomposition of four fundamentally different elements: the realized variance (RV), the variance risk premium (VRP), the realized tail (RT), and the tail risk premium (TRP), respectively. Using an innovative and nonparametric tail risk measure, we find that approximately one-third of the VIX's formation is attributed to the TRP. In addition to VRP, RT and TRP are crucial components for predicting future returns on equity portfolios.

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