投资学关于债券的计算求过程，带圈的三道题。

8.赎回收益率=(100*5%+105)/100-1=10%

注：赎回价格就是发行债券的公司要把债券提前赎回时要向投资者所支付的价格，这道题并没有说明这个赎回价格是包含了当年应该支付利息，所以这利息是要另外计算的。
10.内在价值=(1000*8%/2)/(1+10%/2)+(1000*8%/2)/(1+10%/2)^2+(1000*8%/2)/(1+10%/2)^3+(1000*8%/2)/(1+10%/2)^4+(1000*8%/2)/(1+10%/2)^5+(1000*8%/2)/(1+10%/2)^6+(1000*8%/2)/(1+10%/2)^7+(1000*8%/2)/(1+10%/2)^8+(1000*8%/2)/(1+10%/2)^9+(1000+1000*8%/2)/(1+10%/2)^10=922.78元
12.债券理论价格=100*(1+5*10%)/(1+8%)^5=102.09元