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Common non-linearities in multiple series of stock market volatility

Heather Anderson and Farshid Vahid

No 1/13, Monash Econometrics and Business Statistics Working Papers from Monash University, Department of Econometrics and Business Statistics

Abstract: Decreases in stock market returns often lead to higher increases in volatility than increases in returns of the same magnitude, and it is common to incorporate these so-called leverage effects in GARCH and stochastic volatility models. Recent research has also found it useful to account for leverage in models of realized volatility, as well as in models of the continuous and jump components of realized volatility. This paper explores the use of smooth transition autoregressive (STAR) models for capturing leverage effects in multiple series of the continuous components of realized volatility. We find that the leverage effect is well captured by a common nonlinear factor driven by returns, even though the persistence in each country’s volatility is country specific. A three country model that incorporates both country specific persistence and a common leverage effect offers slight forecast improvements for mid-range horizons, relative to other models that do not allow for the common nonlinearity.

Keywords: Realized Volatility; Bipower Variation; Common Factors; Fore-casting; Leverage; Smooth Transition Models. (search for similar items in EconPapers)
Date: 2013
New Economics Papers: this item is included in nep-ecm, nep-ets and nep-fmk
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