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This paper revisits the fractional cointegrating relationship between ex-ante implied volatility and ex-post realized volatility. We argue that the concept of corridor implied volatility (CIV) should be used instead of the popular model-free option-implied volatility (MFIV) when assessing the...
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In three different ways of lead–lag causal relationship, covariance/correlation and coherence, we apply the wavelets …
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This paper analyses identification for multivariate unobserved components models in which the innovations to trend and cycle are correlated. We address order and rank criteria as well as potential non-uniqueness of the reduced-form VARMA model. Identification is shown for lag lengths larger than...
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in specific correlation dynamics. A strong implication emerges: during the period under research, and from a different …
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