A nonparametric test of a strong leverage hypothesis

Oliver Linton, Yoon-Jae Whang and Yu-Min Yen
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Yu-Min Yen: Institute for Fiscal Studies

No CWP28/13, CeMMAP working papers from Centre for Microdata Methods and Practice, Institute for Fiscal Studies

Abstract: The so-called leverage hypothesis is that negative shocks to prices/ returns affect volatility more than equal positive shocks. Whether this is attributable to changing financial leverage is still subject to dispute but the terminology is in wide use. There are many tests of the leverage hypothesis using discrete time data. These typically involve the fitting of a general parametric or semiparametric model to conditional volatility and then testing the implied restrictions on parameters or curves. We propose an alternative way of testing this hypothesis using realised volatility as an alternative direct nonparametric measure. Our null hypothesis is of conditional distributional dominance and so is much stronger than the usual hypotheses considered previously. We implement our test on a number of stock return datasets using intraday data over a long span. We find powerful evidence in favour or our hypothesis.

Keywords: distribution function; leverage effect; gaussian process (search for similar items in EconPapers)
JEL-codes: C14 C15 (search for similar items in EconPapers)
Date: 2013-07-01
New Economics Papers: this item is included in nep-ban and nep-ecm
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Citations: View citations in EconPapers (1)

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Related works:
Journal Article: A nonparametric test of a strong leverage hypothesis (2016)
Working Paper: A nonparametric test of a strong leverage hypothesis (2013)
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