- purchase = - COGS - ΔInv + ΔAP 本题好像是：- ΔAP , 我想问：怎么来判断 前面这个+ - 号？ 我看题目写的AP 是 increase

老师： 这种年金计算I/Y的题目，计算器我怎么老是嗯不出来呢 PV=-897.77，那个负号摁了在计算器上也不显示又是怎么回事 我哪里操作地不对？麻烦给我解释一下，谢谢！

老师，发生异方差和序列自相关时候，SE（sb1^）为什么会变小呢？

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Which of the following statements regarding spot rates and zero-coupon bonds is least accurate? A The graph of current corporate bond yields is called the spot yield curve. B With zero coupon bonds, investors have no reinvestment risk. C The yield to maturity on a zero coupon bond is called the spot interest rate.

To obtain the spot yield curve, a bond analyst would most likely use the most: A recently issued and actively traded corporate bonds. B recently issued and actively traded government bonds. C seasoned and actively traded government bonds. 这个题目怎么做？

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repurchase agreement： A把bond卖给B，这个A是债券的发行方吗？还是说A只是拥有这个债券？

老师，您好，选项C说的是什么意思？等权指数和价格加权指数比较大小？

如果说113.6只是一个after fee的净值，113.6~120这部分难道第一年不也是作为100~120的一部分算进了incentive fee里了吗？第三年再算上的话不也是多算了一次嘛？