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deviations, and covariances of securities. 第三節(jié) 資本資產(chǎn)定價理論( CAPM) ? 二、 分離定理( separation theorem) ? The optimal bination of risky assets for an investor can be determined without any knowledge of the investor’s preference toward risk and return. ? The risky portion of all investors’ portfolios will be the same. 第三節(jié) 資本資產(chǎn)定價理論( CAPM) ? 三、 市場組合( the market portfolio) ? The market portfolio is a portfolio consisting of all securities in which the proportion invested in each security corresponds to its relative market value. The relative market value of a security is simply equal to the aggregate market value of the security divided by the sum of the aggregate market values of all securities. 第三節(jié) 資本資產(chǎn)定價理論( CAPM) ? 三、 市場組合( the market portfolio) ? 市場組合 M是證券市場和資金市場都處于均衡狀態(tài)時的切點組合 T( tangency portfolio)。第六章 證券投資理論 第一節(jié) 純風(fēng)險資產(chǎn)組合的收益與風(fēng)險 ?一、組合收益與風(fēng)險的計算 ? 1. ? 2. rXrXrXrXrNNiNiip???????? ??22111)(1 12/1?????NiNjijji XXp ??第一節(jié) 純風(fēng)險資產(chǎn)組合的收益與風(fēng)險 ?一、組合收益與風(fēng)險的計算 2/12233221122233222222112111331122121212/1)(1 1)(??????????????NNNNNNNNNNNNpXXXXXXXXXXXXXXXXXXXXXXXNiNjijji????????????????????????????????????????第一節(jié) 純風(fēng)險資產(chǎn)組合的收益與風(fēng)險 )0,1()(1 112/122333222111222322332222212211211121133121122121212/1)(?????????????????????????????????????????????XXXXXXXXXXXXXXXXXXXXXXXXXiijiNiiNNNNNNNNNNNNNNNNNpNiNjijji??????????????????????????????????第一節(jié) 純風(fēng)險資產(chǎn)組合的收益與風(fēng)險 ?一、組合收益與風(fēng)險的計算 ???? jiijij ?????? 2iiiiiii ??第一節(jié) 純風(fēng)險資產(chǎn)組合的收益與風(fēng)險 )( 22 rr iiEi ???)])([( rrrr jjiiij E ????第一節(jié) 純風(fēng)險資產(chǎn)組合的收益與風(fēng)險 ? Given the following variancecovariance matrix for three securities, as well as the percentage of the portfolio for each security, calculate the portfolio’s standard deviation. ? Security 1 Security 2 Security 3 ? Security 1 ? Security 2 ? Security 3 ? X1=.2325 X2=.4070 X3=.3605 ??????????0 0 0,10/2 8 90 0 0,10/1 0 40 0 0,10/1 4 50 0 0,10/1 0 40 0 0,10/8 5 40 0 0,10/1 8 70 0 0,10/1 4 50 0 0,10/1 8 70 0 0,10/1 4 6第一節(jié) 純風(fēng)險資產(chǎn)組合的收益與風(fēng)險 2/13333322331132332222221121331122111112/1)(1 1)(???????????XXXXXXXXXXXXXXXXXXXXNiNjijjip??????????????第一節(jié) 純風(fēng)險資產(chǎn)組合的收益與風(fēng)險 % 2 7 7 1 3.)....(.2/12/1??????????????????????????????p第一節(jié) 純風(fēng)險資產(chǎn)組合的收益與風(fēng)險 ?二、純風(fēng)險資產(chǎn)的選擇 ? 1. 可行集( the feasible set or the opportunity set) ? The feasible set simply represents all possible portfolios that could be formed from a group of N securities. 第一節(jié) 純風(fēng)險資產(chǎn)組合的收益與風(fēng)險 可行集內(nèi)任何一點代表一個或多個證券組合 ?P 最小方差資產(chǎn)組合 E(RP) 第一節(jié) 純風(fēng)險資產(chǎn)組合的收益與風(fēng)險 ?二、純風(fēng)險資產(chǎn)的選擇 ? 2. 有效集定理( the efficient set theorem) ? Offer maximum expected return for varying levels of risk, and ? Offer minimum risk for varying levels of expected return. 第一節(jié) 純風(fēng)險資產(chǎn)組合的收益與風(fēng)險 ?二、純風(fēng)險資產(chǎn)的選擇 ?2. 有效集定理 ?The set of portfolios meeting these two conditions is known as the efficient set (also known as the efficient frontier) 第一節(jié) 純風(fēng)險資產(chǎn)組合的收益與風(fēng)險 有效集 E(RP) ?P 最小方差資產(chǎn)組合 第一節(jié) 純風(fēng)險資產(chǎn)組合的收益與風(fēng)險 ? 二、純風(fēng)險資產(chǎn)的選擇 ? 3. 有效集的確定 ? estimate the expected return vector and variancecovariance matrix ? identify a number of corner portfolios ? A corner portfolio is an efficient portfolio with the following property: 第一節(jié) 純風(fēng)險資產(chǎn)組合的收益與風(fēng)險 ? 二、純風(fēng)險資產(chǎn)的選擇 ? 3. 有效集的確定 ? Any bination of two adjacent corner portfolios will result in a portfolio that lies on