这个符号是啥意思来的sa30/360

NO.PZ2016082406000034 Equbetween the two coupon perio Greater in the seconsix-month periothin the first Cannot terminefrom the information provi ANSWER: A First, we compute the current yielon the six-month bon whiis selling a scount. We solve for y* suth99=1041+y∗20099\text{=}\frac{104}{1+\frac{y\ast}{200}}99=1+200y∗​104​ anfiny∗=10.10%y\ast\text{=}10.10\%y∗=10.10%. Thus the yielsprefor the first bonis 10.1-5.5=4.6%10.1\text{-}5.5\text{=}4.6\%10.1-5.5=4.6%. The seconbonis par, so the yielis y∗=9%y\ast\text{=}9\%y∗=9%. The sprefor the seconbonis   9-6=3%\;9\text{-}6\text{=}3\%9-6=3%. The fault rate for the first periomust greater. The recovery rate is the same for the two perio, so it es not matter for this problem.我们求出来的是secon or remaining 6-month，这个和first 6-month有什么关系啊？

NO.PZ2016082406000034 Equbetween the two coupon perio Greater in the seconsix-month periothin the first Cannot terminefrom the information provi ANSWER: A First, we compute the current yielon the six-month bon whiis selling a scount. We solve for y* suth99=1041+y∗20099\text{=}\frac{104}{1+\frac{y\ast}{200}}99=1+200y∗​104​ anfiny∗=10.10%y\ast\text{=}10.10\%y∗=10.10%. Thus the yielsprefor the first bonis 10.1-5.5=4.6%10.1\text{-}5.5\text{=}4.6\%10.1-5.5=4.6%. The seconbonis par, so the yielis y∗=9%y\ast\text{=}9\%y∗=9%. The sprefor the seconbonis   9-6=3%\;9\text{-}6\text{=}3\%9-6=3%. The fault rate for the first periomust greater. The recovery rate is the same for the two perio, so it es not matter for this problem.请问这里为什么是y*/200?为什么是200呢

Suppose XYZ Corp. htwo bon paying semiannually accorng to the following table: The recovery rate for eain the event of fault is 50%. For simplicity, assume theabonwill fault only the enof a coupon perio The market-implierisk-neutrprobability of fault for XYZ Corp. is Greater in the first six-month periothin the seconEqubetween the two coupon perio Greater in the seconsix-month periothin the first Cannot terminefrom the information provi ANSWER: A First, we compute the current yielon the six-month bon whiis selling a scount. We solve for y* suth99=1041+y∗20099\text{=}\frac{104}{1+\frac{y\ast}{200}}99=1+200y∗​104​ anfiny∗=10.10%y\ast\text{=}10.10\%y∗=10.10%. Thus the yielsprefor the first bonis 10.1-5.5=4.6%10.1\text{-}5.5\text{=}4.6\%10.1-5.5=4.6%. The seconbonis par, so the yielis y∗=9%y\ast\text{=}9\%y∗=9%. The sprefor the seconbonis   9-6=3%\;9\text{-}6\text{=}3\%9-6=3%. The fault rate for the first periomust greater. The recovery rate is the same for the two perio, so it es not matter for this problem. 老师好，这道题我感觉不用考虑那么复杂，感觉都没有考YTM-Rf≈P(1-RR)这个知识点。题目问题问的是XYZ这家公司的违约概率是在上半年高还是下半年高。XYZ公司一共包含了两个债券，第一个A债券只有半年，在第6个月付一次息，第二个B债券是一年，分别在第6个月和1年末付息；而题目还提到了在付息的时候可能会发生违约，那么其实在第6个月的时候，XYZ这家公司违约的概率就是A违约B不违约+B违约A不违约+AB都违约，而在1年末的违约概率是B违约，这样一比较，肯定是在第6个月的时候要更高吧？之前有个同学这么理解的，我觉得很在理，想问问老师这么理解是不是正确的

Suppose XYZ Corp. htwo bon paying semiannually accorng to the following table: The recovery rate for eain the event of fault is 50%. For simplicity, assume theabonwill fault only the enof a coupon perio The market-implierisk-neutrprobability of fault for XYZ Corp. is Greater in the first six-month periothin the seconEqubetween the two coupon perio Greater in the seconsix-month periothin the first Cannot terminefrom the information provi ANSWER: A First, we compute the current yielon the six-month bon whiis selling a scount. We solve for y* suth99=1041+y∗20099\text{=}\frac{104}{1+\frac{y\ast}{200}}99=1+200y∗​104​ anfiny∗=10.10%y\ast\text{=}10.10\%y∗=10.10%. Thus the yielsprefor the first bonis 10.1-5.5=4.6%10.1\text{-}5.5\text{=}4.6\%10.1-5.5=4.6%. The seconbonis par, so the yielis y∗=9%y\ast\text{=}9\%y∗=9%. The sprefor the seconbonis   9-6=3%\;9\text{-}6\text{=}3\%9-6=3%. The fault rate for the first periomust greater. The recovery rate is the same for the two perio, so it es not matter for this problem. 请问公式中，y*/200是什么意思呢