Asymmetry with respect to the memory in stock market volatilities

Carl Lönnbark ()
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Carl Lönnbark: Umeå University

Empirical Economics, 2016, vol. 50, issue 4, No 11, 1409-1419

Abstract: Abstract The empirically most relevant stylized facts when it comes to modeling time-varying financial volatility are the asymmetric response to return shocks and the long memory property. Up till now, these have largely been modeled in isolation. To capture asymmetry also with respect to the memory structure, we introduce a new model and apply it to stock market index data. We find that although the effect on volatility of negative return shocks is higher than for positive ones, the latter are more persistent and relatively quickly dominate negative ones.

Keywords: Financial econometrics; GARCH; News impact; Nonlinear; Risk prediction; Time series (search for similar items in EconPapers)
JEL-codes: C12 C51 C58 G10 G15 (search for similar items in EconPapers)
Date: 2016
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DOI: 10.1007/s00181-015-0975-2

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