问题如下图：
选项：
A. 
B. 
C. 
解释：
本题计算的是发债成本，为什么第一笔债卷的成本不计算在内，因为两笔债都是评价发行，我计算的是Rd=（9%*20/40+7%*20/40）*（1-40%），请问为什么不考虑第一笔发债成本？
企鹅_品职助教 · 2019年09月03日
因为第一笔债务是两年前发行的。WACC是要用当前（最新）的融资成本来计算，前两年发行的债券已经不能反映公司当前的债务融资成本了，所以不用考虑第一笔。
同学也可以参考一下这个回答：http://class.pzacademy.com/#/q/17756
蝈蝈@嗅 · 2020年12月27日
这个链接好像无效。还是不是很明白为什么不需要考虑第一笔？
NO.PZ2016021705000033 问题如下 Two years ago, a company issue$20 million in long-term bon pvalue with a coupon rate of 9 percent. The company hcito issue aition$20 million in bon anexpects the new issue to pricepvalue with a coupon rate of 7 percent. The company hno other outstanng anha trate of 40 percent. To compute the company's weighteaverage cost of capital, the appropriate after-tcost of is closest to: A.4.2%. B.4.8%. C.5.4%. is correct.The relevant cost is the margincost of bt. The before-tmargincost of cestimatethe yielto maturity on a comparable outstanng. After austing for tax, the after-tcost is 7(1 − 0.4) = 7(0.6) = 4.2%.这道题比较综合，将几个考点放到一起考查了，下面逐一首先，题目问，要计算公司的 WACC，其中税后债务成本为多少？在计算税后债务成本时，我们介绍过一个大前提，一定要用新债的市场利率，而不能用 coupon rate新债的市场利率，我们又介绍了两种方法YTM 方法 和 bt-rating 方法但是这道题只提供了 coupon rate 耶，我们怎么算呢？好在题干提供了一个关键词expects the new issue to pricepvalue即债券是平价发行，所以 YTM = coupon rate，所以计算债券的税后成本时，代入 YTM，也就是 coupon rate 但是题目提供了两笔债务的数据，到底代入哪个 coupon rate 呢？应该代入现在即将发行的债务的 coupon rate 7%，而不是两年前那笔债务的 coupon rate 9%为什么呢？因为我们代入 WA公式中的各项资本成本，都是边际成本 margincost of capital综上所述，确定了 YTM = coupon rate = 7%，代入税后债务成本的公式即可这道题比较综合，我个人认为考试时出原题的概率比较小，但是任意一个小的考点拿出来，单独出一道题的概率还是有的。所以如果这道题的原理都理解清楚了，相当于做了多道题目，性价比还是很高的 这题为什么不是如下计算{[20/(20+20)]*9%+[20/(20+20)]*7%}*(1-40%)=4.8%
NO.PZ2016021705000033 问题如下 Two years ago, a company issue$20 million in long-term bon pvalue with a coupon rate of 9 percent. The company hcito issue aition$20 million in bon anexpects the new issue to pricepvalue with a coupon rate of 7 percent. The company hno other outstanng anha trate of 40 percent. To compute the company's weighteaverage cost of capital, the appropriate after-tcost of is closest to: A.4.2%. B.4.8%. C.5.4%. is correct.The relevant cost is the margincost of bt. The before-tmargincost of cestimatethe yielto maturity on a comparable outstanng. After austing for tax, the after-tcost is 7(1 − 0.4) = 7(0.6) = 4.2%.这道题比较综合，将几个考点放到一起考查了，下面逐一首先，题目问，要计算公司的 WACC，其中税后债务成本为多少？在计算税后债务成本时，我们介绍过一个大前提，一定要用新债的市场利率，而不能用 coupon rate新债的市场利率，我们又介绍了两种方法YTM 方法 和 bt-rating 方法但是这道题只提供了 coupon rate 耶，我们怎么算呢？好在题干提供了一个关键词expects the new issue to pricepvalue即债券是平价发行，所以 YTM = coupon rate，所以计算债券的税后成本时，代入 YTM，也就是 coupon rate 但是题目提供了两笔债务的数据，到底代入哪个 coupon rate 呢？应该代入现在即将发行的债务的 coupon rate 7%，而不是两年前那笔债务的 coupon rate 9%为什么呢？因为我们代入 WA公式中的各项资本成本，都是边际成本 margincost of capital综上所述，确定了 YTM = coupon rate = 7%，代入税后债务成本的公式即可这道题比较综合，我个人认为考试时出原题的概率比较小，但是任意一个小的考点拿出来，单独出一道题的概率还是有的。所以如果这道题的原理都理解清楚了，相当于做了多道题目，性价比还是很高的 在计算税后债务成本时，我们介绍过一个大前提，一定要用新债的市场利率，而不能用 coupon rate Q: 我理解之前的有更高的coupon且不会改变， 为什么算整体的cost的时候需要用最新的yiel而不是weighteaverage
NO.PZ2016021705000033问题如下Two years ago, a company issue$20 million in long-term bon pvalue with a coupon rate of 9 percent. The company hcito issue aition$20 million in bon anexpects the new issue to pricepvalue with a coupon rate of 7 percent. The company hno other outstanng anha trate of 40 percent. To compute the company's weighteaverage cost of capital, the appropriate after-tcost of is closest to: A.4.2%.B.4.8%.C.5.4%.is correct.The relevant cost is the margincost of bt. The before-tmargincost of cestimatethe yielto maturity on a comparable outstanng. After austing for tax, the after-tcost is 7(1 − 0.4) = 7(0.6) = 4.2%.请问这题从哪里看出来是平价发行？
NO.PZ2016021705000033 问题如下 Two years ago, a company issue$20 million in long-term bon pvalue with a coupon rate of 9 percent. The company hcito issue aition$20 million in bon anexpects the new issue to pricepvalue with a coupon rate of 7 percent. The company hno other outstanng anha trate of 40 percent. To compute the company's weighteaverage cost of capital, the appropriate after-tcost of is closest to: A.4.2%. B.4.8%. C.5.4%. is correct.The relevant cost is the margincost of bt. The before-tmargincost of cestimatethe yielto maturity on a comparable outstanng. After austing for tax, the after-tcost is 7(1 − 0.4) = 7(0.6) = 4.2%. 问题如下Two years ago, a company issue$20 million in long-term bon pvalue with a coupon rate of 9 percent. The company hcito issue aition$20 million in bon anexpects the new issue to pricepvalue with a coupon rate of 7 percent. The company hno other outstanng anha trate of 40 percent. To compute the company's weighteaverage cost of capital, the appropriate after-tcost of is closest to:A.4.2%.B.4.8%.C.5.4%.A is correct.The relevant cost is the margincost of bt. The before-tmargincost of cestimatethe yielto maturity on a comparable outstanng. After austing for tax, the after-tcost is 7(1 − 0.4) = 7(0.6) = 4.2%.如题
NO.PZ2016021705000033 问题如下 Two years ago, a company issue$20 million in long-term bon pvalue with a coupon rate of 9 percent. The company hcito issue aition$20 million in bon anexpects the new issue to pricepvalue with a coupon rate of 7 percent. The company hno other outstanng anha trate of 40 percent. To compute the company's weighteaverage cost of capital, the appropriate after-tcost of is closest to: A.4.2%. B.4.8%. C.5.4%. is correct.The relevant cost is the margincost of bt. The before-tmargincost of cestimatethe yielto maturity on a comparable outstanng. After austing for tax, the after-tcost is 7(1 − 0.4) = 7(0.6) = 4.2%. 如题