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EGARCH-SN模型及其实证研究

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摘要 首先研究了以往GARCH模型对误差项的各种选择方法,并基于Sahu等(2003)和Branco、Dey(2001)等对偏正态分布的研究,提出了EGARCH(1,1)-SN模型;该模型能同时考虑收益序列的"有偏、尖峰和肥尾"特性以及正负新息非对称冲击的杠杆效应,是理论上较为理想的波动模型。选用沪深A股1996-2005年日收益率数据对模型进行了检验,结果发现:EGARCH(1,1)-SN模型对沪深两市收益波动的拟合效果很好;同时",波动序列非对称性"比"收益序列非对称性"更为重要;正负新息均具有增大后期波动之趋势,但负新息对后期波动的影响更大。
作者 倪明
出处 《时代金融》 2007年第10X期27-31,共5页 Times Finance
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参考文献10

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