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We introduce a new fractionally integrated model for covariance matrix dynamics based on the long-memory behavior of daily realized covariance matrix kernels and daily return observations. We account for fat tails in both types of data by appropriate distributional assumptions. The covariance...
Persistent link: https://www.econbiz.de/10011531139
Cholesky multivariate stochastic volatility model.It establishes that systematically different dynamic restrictions are imposed … divergent when volatility clusters idiosyncratically.It is illustrated that this property is important for empirical … indicate that conclusions may critically hinge on a selectedordering of variables. The dynamic correlation Cholesky …
Persistent link: https://www.econbiz.de/10012250452
Cholesky multivariate stochastic volatility model. It establishes that systematically different dynamic restrictions are … divergent when volatility clusters idiosyncratically. It is illustrated that this property is important for empirical … indicate that conclusions may critically hinge on a selected ordering of variables. The dynamic correlation Cholesky …
Persistent link: https://www.econbiz.de/10012424283
If the intensity parameter in a jump diffusion model is identically zero, then parameters characterizing the jump size density cannot be identified. In general, this lack of identification precludes consistent estimation of identified parameters. Hence, it should be standard practice to...
Persistent link: https://www.econbiz.de/10010361470
We propose different schemes for option hedging when asset returns are modeled using a general class of GARCH models. More specifically, we implement local risk minimization and a minimum variance hedge approximation based on an extended Girsanov principle that generalizes Duan's (1995) delta...
Persistent link: https://www.econbiz.de/10013065375
We derive analytic series representations for European option prices in polynomial stochastic volatility models. This …
Persistent link: https://www.econbiz.de/10011870651
We formulate a bivariate stochastic volatility jump-diffusion model with correlated jumps and volatilities. An MCMC … stock (PX index) returns. Four bivariate models with and without jumps and/or stochastic volatility are compared using the … deviance information criterion (DIC) confirming importance of incorporation of jumps and stochastic volatility into the model …
Persistent link: https://www.econbiz.de/10013121407
Persistent link: https://www.econbiz.de/10011691606
We propose a semiparametric multivariate estimator and a multivariate score-type testing procedure under a perturbed multivariate fractional process. The estimator is based on the periodogram and uses a local Whittle criterion function which is generalised by an additional constant to capture...
Persistent link: https://www.econbiz.de/10014247836
This paper proposes methods for both the consistent estimation of so-called long run canonical correlations (LRCCs) and also testing the null hypothesis that a subset of LRCCs are zero. Two test statistics are proposed and their limiting distribution is derived under the null hypothesis. It is...
Persistent link: https://www.econbiz.de/10013155084