麻烦问下这两种return的区别

swap在期初value为什么是0？ b为什么对？

c为啥不对？

The manager of the Fullen Balanced Fund is putting together a report that breaks out the percentage of the variation in portfolio return that is explained by the target asset allocation, security selection, and tactical variations from the target, respectively. Which of the following sets of numbers was the most likely conclusion for the report? A 50%, 25%, 25%. B 90%, 6%, 4%. C 33%, 33%, 33%. 这题说啥呢？

货币局制度的话重点不是在背后要储藏外汇支持吗？这样仅仅是1:1盯住的话怎么理解？

不分红的eour和American不是应该same 吗？

Which of the following ratios would least likely measure liquidity? A Return on assets (ROA). B Quick ratio. C Current ratio. 这题不会吧？b和c才是衡量流动性的呀

For a stock that pays no dividends, the value of an American call option is most likely: A the same as the value of a European call option with otherwise identical features. B greater than the value of a European call option with otherwise identical features. C less than the value of a European call option with otherwise identical features. 为什么价格差异只看分红呢？

If three bonds are otherwise identical, the one exhibiting the highest level of positive convexity is most likely the one that is: A Putable. B Callable. C Option-free. 这题答案对吗？印象中是原版书课后习题，但是原版书答案不是这个

答案很牵强我不服，价格指数的构成需要经常变动吗？