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Modeling time-varying skewness via decomposition for out-of-sample forecast

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  • Liu, Xiaochun

Abstract

This paper models the time-varying skewness via a return decomposition framework which splits a return into the product of absolute return and its sign. Specifically, the nonlinear dependence between absolute returns and signs is characterized by a dynamic copula function which governs a dynamic skewness process of financial returns. The importance of modeling the time-varying skewness is evaluated via out-of-sample forecasts for the US excess stock returns, in terms of both statistical significance and economic relevance. I find that the skewness timing of the proposed time-varying dependence models yields an average gain in the returns of around 195 basis points per year over the forecast sample period. Statistically, the fluctuation test shows strong evidence that the forecasting performance of the decomposition models is unstable over the sample time path. In this regard, a forecast combination, being more robust to structural instability than the individual forecasts, performs significantly better than the benchmarks out-of-sample.

Suggested Citation

  • Liu, Xiaochun, 2015. "Modeling time-varying skewness via decomposition for out-of-sample forecast," International Journal of Forecasting, Elsevier, vol. 31(2), pages 296-311.
  • Handle: RePEc:eee:intfor:v:31:y:2015:i:2:p:296-311
    DOI: 10.1016/j.ijforecast.2014.03.020
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    Cited by:

    1. repec:eee:jbfina:v:82:y:2017:i:c:p:1-19 is not listed on IDEAS
    2. Frazier, David T. & Liu, Xiaochun, 2016. "A new approach to risk-return trade-off dynamics via decomposition," Journal of Economic Dynamics and Control, Elsevier, vol. 62(C), pages 43-55.
    3. repec:eee:quaeco:v:66:y:2017:i:c:p:275-293 is not listed on IDEAS

    More about this item

    Keywords

    Nonlinear dependence; Copula constancy tests; Dynamic tail dependence and asymmetry; Fluctuation tests; Skewness timing; Volatility timing; Forecast combination;

    JEL classification:

    • C53 - Mathematical and Quantitative Methods - - Econometric Modeling - - - Forecasting and Prediction Models; Simulation Methods
    • G00 - Financial Economics - - General - - - General

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