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基于风险中性理论的CMBS模型探讨

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摘要 商业住房抵押贷款证券(CMBS)在西方发达国家已成为一种成熟的开发性金融产品。在我国,这一金融产品也扮演着越来越重要的角色。基于风险中性理论模型的基本思想是抓住等比例危害模型中提前还款成交的部分,构建在鞅测度下的CMBS定价模型,而抓住特定资产池的再融资部分则需要通过单个解释变量,如合同规定利率与当前抵押贷款基准利率之差、资产池递减现象等。为了更好地符合现实,模型将一般经济环境(GDP)作为一个额外因素放入提前还款过程中,最后运用Girsanov定理将现实世界测度转化为风险中性测度。
作者 朱姝鹏
出处 《商业经济》 2010年第19期24-25,共2页 Business & Economy
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