项目名称: 中国国家外汇资产的三层定量分级与结构动态调整:理论及实证研究
项目编号: No.70803003
项目类型: 青年科学基金项目
立项/批准年度: 2009
项目学科: 金属学与金属工艺
项目作者: 马杰
作者单位: 北京航空航天大学
项目金额: 18万元
中文摘要: 本课题从外汇储备规模与结构两个方面,展开了多层次研究。从缓冲储备模型出发,通过修正Ramachandran & Srinivasan模型(2007),我们对中国外储需求进行了理论建模与实证研究;再将这个研究思路扩展为多国框架,运用"面板数据模型"比较了全球金融一体化背景下金砖四国外储需求的异同状况。 为优化外汇储备结构,我们先构建了基于DCC-GARCH的外汇储备结构动态调整模型,作了三项改进:采用动态条件自相关多元GARCH 模型度量风险、引入利率平价反映可比货币收益率及将黄金视为外汇储备替代资产纳入到统一分析框架中。然后,进一步将用CVaR来替代VaR,以更好地刻画风险。为兼顾国际金融市场变化及实体经贸需求对中国外储结构影响,结合具体国情选择美、欧、日及英镑作为备选货币,构建DCC-GARCH-CVaR模型,以从"币种动态时变相关关系、风险约束刻画"两个角度改进理论模型。每种理论模型的实证研究,均得出了有意义的现实启示。 此外,还从亚洲货币合作中中国如何占据主导地位、以及完善人民币汇率机制改革研究两个方面,探讨了如何充分发挥超额中国外汇储备的优势地位。
中文关键词: 外汇储备;规模;结构;DCC-GARCH;条件风险价值
英文摘要: This project extends its research from two aspects: the scale and the structure of the foreign reserve. Starting from the buffer-stock model and modifying the Ramachandran & Srinivasan model(2007),we construct a new model for the Chinese foreign reserve. And then we extend this model to a framework of panel data, and compare the demand function among the brics countries. To optimize the structure of foreign reserve, we first construct a model based on DCC-GARCH, which includes three main improvements: employing the dynamic conditional correlation to gauge the risk, introducing the parity of interest rate to discount the yield of currency and incorporating the gold into the foreign reserve. And then, we employ CVaR to replace VaR to gauge the risk better, and construct a comprehensive model based on DCC-GARCH-CVaR, which improves the traditional model from two angles: the depict of correlationship and the gauge of risk. Via the empirical research of theoretic models, we find very useful results. In addition, we explore how to exert the predominance of the Chinese reserve from two aspects: to pursue the dominance position in the currency coorperation of Asia countries, and to perfect the mechanism reform of RMB exchange rate.
英文关键词: foreign reserve; scale; structure; DCC-GARCH;CVaR