Decomposing the VIX: Implications for the predictability of stock returns
K. Victor Chow
Chambers College of Business and Economics, West Virginia University, Morgantown, West Virginia
Search for more papers by this authorWanjun Jiang
Guanghua School of Management, Peking University, Beijing, China
Search for more papers by this authorCorresponding 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
Search for more papers by this authorJingrui Li
A.B. Freeman School of Business, Tulane University, New Orleans, Louisiana
Search for more papers by this authorK. Victor Chow
Chambers College of Business and Economics, West Virginia University, Morgantown, West Virginia
Search for more papers by this authorWanjun Jiang
Guanghua School of Management, Peking University, Beijing, China
Search for more papers by this authorCorresponding 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
Search for more papers by this authorJingrui Li
A.B. Freeman School of Business, Tulane University, New Orleans, Louisiana
Search for more papers by this authorAbstract
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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