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引入跳跃与联跳强度的沪深300股指期货套期保值研究
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摘要
考虑到资产收益的跳跃以及联跳行为给套期保值策略带来的挑战,利用沪深300股指期货与沪深300指数及其成分股的5分钟高频数据,识别现货跳跃、期货跳跃、期货-现货联跳以及成分股联跳,并用Hawkes过程估计相应跳跃强度与联跳强度,在基本的向量异质自回归(VecHAR)模型基础上提出引入跳跃强度与联跳强度的VecHAR-RVRCOV-CJ-JICI模型。实证表明,根据新模型构建的动态套期保值策略,相较于根据常用二元GARCH模型以及根据不考虑跳跃强度和联跳强度的VecHAR-RVRCOV-CJ模型构建的动态套期保值策略,具有更优的样本外套期保值绩效。因此引入跳跃强度与联跳强度可以有效改善对沪深300股指期货的动态套保。
The jumps and co-jumps of asset returns bring challenges to dynamic hedging strategies.Using the five-minute prices of CSI 300 index,index futures and their constituent stocks,we detect index jumps,futures jumps,index-futures co-jumps and constituent stocks co-jumps,and use the Hawkes process to estimate the jump and co-jump intensities.Then we improve the basic vector heterogeneous autoregressive model to the VecHAR-RVRCOV-CJ-JICI model which takes jump and co-jump intensities as regressors.Empirical results show that,the dynamic hedging strategy based on our proposed model is much better than those based on the popular bi-variate GARCH models and the VecHAR-RVRCOV-CJ model which does not include jump or co-jump intensities,in terms of the out-of-sample hedging performance.Therefore,including jump and co-jump intensities can effectively improve the dynamic hedging of CSI 300 index futures.
引文
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