原版书考虑了交叉项

NO.PZ2018113001000083 问题如下 Bevis is aiser to WT, a funanagement firm. WT's clients are all high-net-worth clients in the U.S. Bevis manages the account for Clare, one ofhis clients, whiha totreturn of 4.418% last year. Bevis wants to calculatethe return e to the foreign currencontribution.Exhibit 1 summarizes the investmentinformation for Clare's account last yeCalculate the contribution of foreign currento the totreturn. Answer:the Clare account’s tot(US llar) return of 4.418%.The weighteasset return is equto 1.8%, calculatefollows:(60%×5%）+[ 40%×（-3%）] = 1.8%The mestic-currenreturn is equto the sum of the weighteasset return, the weightecurrenreturn, anthe weightecross-proof the asset return anthe currenreturn. The latter two terms explain the effects of foreign-currenmovements.Therefore, the contribution of foreign currenequals 2.618% = 4.418% - 1.8% .中文解析本题考察的是外汇投资中return的计算。要求解的“the contribution of foreign currency”是包含了两部分的，一是RFX，二是交叉项RFC ×RFX。因此，在总的return中减掉RFC 后，剩下的return就是由foreign currency贡献的return了。另外一种计算方法the contribution of foreign curren= wiRFX+wiRFCRFX=0.6*0.02+0.4*0.035+0.6*0.05*0.02+0.4*0.035*(-0.03)=2.618% the return e to the foreign currencontribution is 2.618%

NO.PZ2018113001000083问题如下 Bevis is aiser to WT, a funanagement firm. WT's clients are all high-net-worth clients in the U.S. Bevis manages the account for Clare, one ofhis clients, whiha totreturn of 4.418% last year. Bevis wants to calculatethe return e to the foreign currencontribution.Exhibit 1 summarizes the investmentinformation for Clare's account last yeCalculate the contribution of foreign currento the totreturn. Answer:the Clare account’s tot(US llar) return of 4.418%.The weighteasset return is equto 1.8%, calculatefollows:(60%×5%）+[ 40%×（-3%）] = 1.8%The mestic-currenreturn is equto the sum of the weighteasset return, the weightecurrenreturn, anthe weightecross-proof the asset return anthe currenreturn. The latter two terms explain the effects of foreign-currenmovements.Therefore, the contribution of foreign currenequals 2.618% = 4.418% - 1.8% .中文解析本题考察的是外汇投资中return的计算。要求解的“the contribution of foreign currency”是包含了两部分的，一是RFX，二是交叉项RFC ×RFX。因此，在总的return中减掉RFC 后，剩下的return就是由foreign currency贡献的return了。另外一种计算方法the contribution of foreign curren= wiRFX+wiRFCRFX=0.6*0.02+0.4*0.035+0.6*0.05*0.02+0.4*0.035*(-0.03)=2.618% R=Rfc+Rfx+R*Rfc这道题目的答案有两种方法。如果第二种方发的逻辑是对的（考虑交叉项的影像），那么为什么第一种方法再算Rfc的时候，不考虑交叉项的影响？

NO.PZ2018113001000083 问题如下 Bevis is aiser to WT, a funanagement firm. WT's clients are all high-net-worth clients in the U.S. Bevis manages the account for Clare, one ofhis clients, whiha totreturn of 4.418% last year. Bevis wants to calculatethe return e to the foreign currencontribution.Exhibit 1 summarizes the investmentinformation for Clare's account last yeCalculate the contribution of foreign currento the totreturn. Answer:the Clare account’s tot(US llar) return of 4.418%.The weighteasset return is equto 1.8%, calculatefollows:(60%×5%）+[ 40%×（-3%）] = 1.8%The mestic-currenreturn is equto the sum of the weighteasset return, the weightecurrenreturn, anthe weightecross-proof the asset return anthe currenreturn. The latter two terms explain the effects of foreign-currenmovements.Therefore, the contribution of foreign currenequals 2.618% = 4.418% - 1.8% .中文解析本题考察的是外汇投资中return的计算。要求解的“the contribution of foreign currency”是包含了两部分的，一是RFX，二是交叉项RFC ×RFX。因此，在总的return中减掉RFC 后，剩下的return就是由foreign currency贡献的return了。另外一种计算方法the contribution of foreign curren= wiRFX+wiRFCRFX=0.6*0.02+0.4*0.035+0.6*0.05*0.02+0.4*0.035*(-0.03)=2.618% 有两个疑问1. foreign currencontribution中和教材里面的RFC感觉刚好可以对应，而且教材里面的表述也是return on foreign currency，感觉有点混淆。2.交叉项的处理上面是有点模糊的，我自己刚开始想的处理方式是交叉项*0.5。我的问题是这次问foreign currencontribution要加交叉项，下次如果问的是外币资产的收益贡献呢？也要算完整的交叉项吗？

NO.PZ2018113001000083 问题如下 Bevis is aiser to WT, a funanagement firm. WT's clients are all high-net-worth clients in the U.S. Bevis manages the account for Clare, one ofhis clients, whiha totreturn of 4.418% last year. Bevis wants to calculatethe return e to the foreign currencontribution.Exhibit 1 summarizes the investmentinformation for Clare's account last yeCalculate the contribution of foreign currento the totreturn. Answer:the Clare account’s tot(US llar) return of 4.418%.The weighteasset return is equto 1.8%, calculatefollows:(60%×5%）+[ 40%×（-3%）] = 1.8%The mestic-currenreturn is equto the sum of the weighteasset return, the weightecurrenreturn, anthe weightecross-proof the asset return anthe currenreturn. The latter two terms explain the effects of foreign-currenmovements.Therefore, the contribution of foreign currenequals 2.618% = 4.418% - 1.8% .中文解析本题考察的是外汇投资中return的计算。要求解的“the contribution of foreign currency”是包含了两部分的，一是RFX，二是交叉项RFC ×RFX。因此，在总的return中减掉RFC 后，剩下的return就是由foreign currency贡献的return了。另外一种计算方法the contribution of foreign curren= wiRFX+wiRFCRFX=0.6*0.02+0.4*0.035+0.6*0.05*0.02+0.4*0.035*(-0.03)=2.618% Rfc=60%5%+40%（-3%）=1.8%Rfx=60%2%+40%*3.5%=2.6%Rfx+RfcRfx=2.6%+2.6%*1.8%=2.6468