基于Copula-Jump-GARCH模型的借貸資產組合優(yōu)化
本文關鍵詞:基于Copula-Jump-GARCH模型的借貸資產組合優(yōu)化 出處:《南京財經(jīng)大學》2013年碩士論文 論文類型:學位論文
更多相關文章: Jump-GARCH模型 Copula函數(shù) CVaR
【摘要】:按照均值-方差思想,資產組合優(yōu)化就是找到收益率一定風險最小的資產組合或者是一定風險下的收益率最大的資產組合。傳統(tǒng)的均值-方差理論同時假設單個資產和聯(lián)合分布都服從正態(tài)分布。但是大量的實證研究結果表明資產的收益率往往表現(xiàn)出波動性聚類、尖峰厚尾性和跳躍性等特點,而資產之間的相關關系也呈現(xiàn)出非線性。因此用傳統(tǒng)的均值-方差模型來尋找資產組合的最優(yōu)化策略已經(jīng)不符合現(xiàn)實。 為了克服傳統(tǒng)理論的不足,本文主要運用Jump-GARCH模型來擬合單個資產的收益率,用Copula函數(shù)來刻畫資產之間的相關結構關系,并把兩者相結合共同描述資產組合的聯(lián)合分布,用Mean-CVaR方法來解決借貸資產組合優(yōu)化問題,通過計算一定期望收益率下的最小CVaR值得到最優(yōu)借貸資產配置策略。 本文分別用GARCH、SV和Jump-GARCH模型對上證綜合指數(shù)進行擬合對比分析,發(fā)現(xiàn)Jump-GARCH模型能夠更好地擬合資產收益率的各種特性。用Jump-GARCH模型對中國聯(lián)通、中國石化和中青旅這三家公司的收益率進行研究,并通過對比刻畫三家公司之間相關結構的幾種Copula函數(shù),最終得到了t-Copula函數(shù)能夠更好地構建資產組合之間的相關結構。最后在Mean-CVaR模型的限制下,得到了借貸資產的最優(yōu)配置策略。這給銀行在決策投放貸款比例時,,提供了一定的理論指導。
[Abstract]:According to the mean-variance idea. Portfolio optimization is to find the portfolio with the minimum return rate or the largest yield under a certain risk. The traditional mean-variance theory assumes that both the individual asset and the joint distribution are conformable to each other. But a large number of empirical results show that the return rate of assets tends to show volatility clustering. The correlation between assets is nonlinear, so the traditional mean-variance model is not in line with the reality. In order to overcome the shortcomings of traditional theory, this paper mainly uses Jump-GARCH model to fit the return rate of a single asset, and uses Copula function to describe the relationship between assets. And the combination of the two to describe the joint distribution of portfolio, using the Mean-CVaR method to solve the loan portfolio optimization problem. By calculating the minimum CVaR value under a certain expected rate of return, the optimal loan asset allocation strategy is obtained. In this paper, GARCHN SV and Jump-GARCH models are used to compare and analyze Shanghai Composite Index. It is found that the Jump-GARCH model can better fit the various characteristics of the return on assets. The Jump-GARCH model is applied to China Unicom. The return rate of Sinopec and China Youth Tours is studied, and several Copula functions are compared to describe the correlation structure between the three companies. Finally, the t-Copula function can better construct the correlation structure between asset combinations. Finally, under the limitation of Mean-CVaR model. The optimal allocation strategy of loan assets is obtained, which provides certain theoretical guidance for banks to make decision on loan ratio.
【學位授予單位】:南京財經(jīng)大學
【學位級別】:碩士
【學位授予年份】:2013
【分類號】:F224;F832.51
【參考文獻】
相關期刊論文 前10條
1 岳瑞鋒,李振東,楊曉萍;風險管理的CVaR方法及其簡化模型[J];河北省科學院學報;2003年03期
2 余素紅,張世英,宋軍;基于GARCH模型和SV模型的VaR比較[J];管理科學學報;2004年05期
3 陳浪南;孫堅強;;股票市場資產收益的跳躍行為研究[J];經(jīng)濟研究;2010年04期
4 童漢飛;劉宏偉;;中國股市收益率與波動率跳躍性特征的實證分析[J];南方經(jīng)濟;2006年05期
5 謝赤,鄧藝穎;描述利率動態(tài)行為的GARCH-JUMP模型[J];數(shù)量經(jīng)濟技術經(jīng)濟研究;2003年03期
6 孫志賓;;混合Copula模型在中國股市的應用[J];數(shù)學的實踐與認識;2007年20期
7 包衛(wèi)軍;徐成賢;;基于多維t-Copula函數(shù)的投資組合的CVaR分析[J];統(tǒng)計與決策;2008年20期
8 郭文旌;徐少麗;;基于Copula-EGARCH-CVaR的投資組合優(yōu)化[J];統(tǒng)計與決策;2009年18期
9 包衛(wèi)軍;胡杰;;基于多維Copula函數(shù)的投資組合CVaR分析[J];統(tǒng)計與信息論壇;2008年09期
10 楊益黨;羅羨華;;Copula函數(shù)的參數(shù)估計[J];新疆師范大學學報(自然科學版);2007年02期
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