问题如下图：
选项：
A. 
B. 
C. 
解释：
能否再多解释一下statement VI为什么是错的，答案没有看太明白
发亮_品职助教 · 2020年02月28日
嗨，从没放弃的小努力你好：
"能否再多解释一下statement VI为什么是错的，答案没有看太明白"
回想在Inter-market strategies里，我们在一堆国家的债券里选择一支进行投资，要求找一个收益最高的债券来投。
这种题目的第一步：是我们把不同国家的债券，Hedge成一个Common currency之后进行比较，选出来收益最高的债券就已经是最好的债券了，Portfolio的Based currency一定不会影响债券之间的相对优劣关系。
原因是，当我们把债券Hedge成一个Common currency之后，例如，把所有债券都Hedge成USD，债券的收益已经是可比的了，收益大小自然已经排好顺序了，与我们Portfolio的Base currency货币是啥无关。我们Portfolio的计价货币是EUR/JPY/CNY都无所谓，都不会影响到所有债券以美元计价的收益排序。
Statement VI说：债券收益的相对优劣，取决于Base currency，这点完全错误，Hedge成任意一个Common Currency之后，所有债券的比较基准已定，债券收益的排序就是定死的，与我们Portfolio的Base currency是啥无关；例如上面的解释，把所有债券Hedge成USD收益之后，债券收益的排序就已定，我们是EUR Portfolio、还是CNY的Portfolio，看到这个以美元计价的收益排序是一样的，不受Base currency的影响。
参考原版书原句：
-------------------------------虽然现在很辛苦，但努力过的感觉真的很好，加油！
Echo218 · 2020年02月29日
谢谢解释！因为我之前的理解是，即使是全部转换成common currency来排序，也是需要根据不同base currency和common currency的汇率来进行转换，所以还是跟base currency有关的。 那么是否可以理解为，如果已经根据不同base currency的汇率hedged完之后，就是跟base currency无关了？这个关键点在于是hedged之后？
NO.PZ2019103001000060 Statement V Statement VI C is correct. Winslow’s Statement VI is incorrect. e to covereinterest arbitrage, the relative attractiveness of bon es not penon the curreninto whithey are heefor comparison. Hence, the ranking of bon es not penon the base currenof the portfolio. A is incorrebecause Winslow’s Statement IV is correct. Inter-market tras shoulassesseon the basis of returns heeinto a common currency. ing so ensures ththey are comparable. Neither loccurrenreturns nor unheereturns are comparable across markets because they involve fferent currenexposures/risks. B is incorrebecause Winslow’s Statement V is correct. The primary iver of inter-market tras is anticipatechanges in yielfferentials. Over horizons most relevant for active bonmanagement, the capitgains/losses arising from yielmovements generally minate the income component of return (i.e., carry) anrolling wn the curve. Hence, expectations with respeto yielmovements are the primary iver of inter-market tra cisions. INTER-MARKET的驱动因素应该是利差保持不变吧？
NO.PZ2019103001000060 麻烦老师下A谢谢
NO.PZ2019103001000060 Statement V Statement VI C is correct. Winslow’s Statement VI is incorrect. e to covereinterest arbitrage, the relative attractiveness of bon es not penon the curreninto whithey are heefor comparison. Hence, the ranking of bon es not penon the base currenof the portfolio. A is incorrebecause Winslow’s Statement IV is correct. Inter-market tras shoulassesseon the basis of returns heeinto a common currency. ing so ensures ththey are comparable. Neither loccurrenreturns nor unheereturns are comparable across markets because they involve fferent currenexposures/risks. B is incorrebecause Winslow’s Statement V is correct. The primary iver of inter-market tras is anticipatechanges in yielfferentials. Over horizons most relevant for active bonmanagement, the capitgains/losses arising from yielmovements generally minate the income component of return (i.e., carry) anrolling wn the curve. Hence, expectations with respeto yielmovements are the primary iver of inter-market tra cisions. 帮忙下V的描述可以吗谢谢！
Statement V Statement VI C is correct. Winslow’s Statement VI is incorrect. e to covereinterest arbitrage, the relative attractiveness of bon es not penon the curreninto whithey are heefor comparison. Hence, the ranking of bon es not penon the base currenof the portfolio. A is incorrebecause Winslow’s Statement IV is correct. Inter-market tras shoulassesseon the basis of returns heeinto a common currency. ing so ensures ththey are comparable. Neither loccurrenreturns nor unheereturns are comparable across markets because they involve fferent currenexposures/risks. B is incorrebecause Winslow’s Statement V is correct. The primary iver of inter-market tras is anticipatechanges in yielfferentials. Over horizons most relevant for active bonmanagement, the capitgains/losses arising from yielmovements generally minate the income component of return (i.e., carry) anrolling wn the curve. Hence, expectations with respeto yielmovements are the primary iver of inter-market tra cisions.C 为什么汇率变动不影响return的排序，hee return=Rlc+Rfx 外币的升贬值会影响hee return呀
Statement V Statement VI C is correct. Winslow’s Statement VI is incorrect. e to covereinterest arbitrage, the relative attractiveness of bon es not penon the curreninto whithey are heefor comparison. Hence, the ranking of bon es not penon the base currenof the portfolio. A is incorrebecause Winslow’s Statement IV is correct. Inter-market tras shoulassesseon the basis of returns heeinto a common currency. ing so ensures ththey are comparable. Neither loccurrenreturns nor unheereturns are comparable across markets because they involve fferent currenexposures/risks. B is incorrebecause Winslow’s Statement V is correct. The primary iver of inter-market tras is anticipatechanges in yielfferentials. Over horizons most relevant for active bonmanagement, the capitgains/losses arising from yielmovements generally minate the income component of return (i.e., carry) anrolling wn the curve. Hence, expectations with respeto yielmovements are the primary iver of inter-market tra cisions.那还有个carry tra的类型是直接比较两国利率高低，借低的投高的，为什么就不用转换成common currency再比较了呢？