求Par bond yield curve有什么用涂吗？

C选项，Increase the level of significance to 5.67%.感觉也对啊

老师，投资性房地产的gain和loss具体是在EBIT之前哪里列支的呢？

01.单选题 已收藏 标记 纠错 According to put-call-forward parity, the difference between the price of a put and the price of a call is most likely equal to the difference between: A spot price and exercise price discounted at the risk-free rate. B exercise price and forward price discounted at the risk-free rate. C forward price and spot price discounted at the risk-free rate. 听不清楚

视频解答中，对于A的解析有疑问，oas确实是在zspread基础上调整的，a选项与书中的解释，主要差别在added to这里，老师能否再说下a的问题在哪里。

A put option with an exercise price of 80 will expire in 73 days. No cash payments will be made by the underlying asset over the life of the option. If the underlying asset is at 75 and the risk-free rate of return is 5.0 percent, what are the lower bounds for an American put option and a European put option, respectively, closest to: A for an American put option is 4.22; for a European put option is 5.00. B for an American put option is 5; for a European put option is 4.22. C for an American put option is 4.22; for a European put option is 4.22. 这个题解答下

01.单选题 收藏 标记 纠错 A call option with a strike price of 60 will expire in 80 days. No cash payments will be made by the underlying asset over the life of the option. If the underlying asset price is 70 and the risk-free rate of return is 5.0 percent, the lower bound for an American call option and a European call option, respectively, are closest to A the lower bound for an American call option is 10; the lower bound for a European call option is 10.64. B the lower bound for an American call option is 10.64; the lower bound for a European call option is 10. C the lower bound for an American call option is 10.64; the lower bound for a European call option is 10.64. 这个题啥也听不见，麻烦老师讲解

At expiration, a European put option will be valuable if the exercise price is: A less than the underlying price. B equal to the underlying price. C greater than the underlying price.这个题不理解

老师好，请问为什么说可赎回权对发行人有利呢？可赎回价不是一般大于面值吗？相当于公司以更大的成本赎回了债券，重新发债节省的利息一定就能弥补赎回的亏损吗？

老师好，请问为什么说可赎回权对发行人有利呢？可赎回价不是一般大于面值吗？相当于公司以更大的成本赎回了债券，重新发债节省的利息一定就能弥补赎回的亏损吗？