为什么ln(1+r)=r

这个题目最终算出来的TPPC是-1380，从数值上看是小于contribution的680，但是绝对值比680大，答案说的是under,那是不是可以理解成判断under还是over是判断contribution和TPPC的绝对值？如果这个题目的TPPC是正的100，比如（4500-4200）-200=100，那是不是可以理解成是over?

A选项为什么不对？

老师 12题的C怎么知道du和dl的？

从unrealized profit500可以知道 un.real是3/4~ 这个3/4的比例不太理解从哪里来 ，跟net income对比来的吗？

这里的前提得加上：这是非同一控制下的企业合并。 因为如果是同一控制下的企业合并是不产生新的商誉的。

老师 一般情况下 ：什么时候用参数法算var?什么时候用蒙特卡洛模拟？

An Australia-based fixed-income investment manager is deciding how to allocate herportfolio between Australia and Japan. (As before, the AUD is the domestic currency.)Australia’s one-year deposit rate is 5%, considerably higher than Japan’s at 1%, butthe Australian dollar is estimated to be roughly 10% overvalued relative to the Japaneseyen based on purchasing power parity. Before making her asset allocation, the investmentmanager considers the implications of interest rate differentials and PPP imbalances. 1.All else equal, which of the following events would restore the Australian dollarto its PPP value? A.The Japanese inflation rate increases by 4%. B.The Australian inflation rate decreases by 10%. C.The JPY/AUD exchange rate declines by 10%. 答案为什么选C，希望老师解答下，谢谢

If uncovered interest rate parity holds, today’s expected value for the JPY/GBP currencypair one year from now would be closest to: A.126.02. B.129.67. C.130.05. A is correct. If uncovered interest rate parity holds, then forward rate parity willhold and the expected spot rate one year forward is equal to the one-year forwardexchange rate. This forward rate is calculated in the usual manner, given the spotexchange rates and Libors: Se=F=129.67( 1.001 1.03 )=126.02 为什么说uncovered interest rate parity holds, then forward rate parity willhold？

麻烦老师讲解下第二题和第四题，不是很理解对应的知识点；答案分别是C,B