每年息票=1000*8%=80元
(1)债券价值=80/(1+15%)+80/(1+15%)^2+80/(1+15%)^3+80/(1+15%)^4+1000/(1+15%)^4=800.15元
(2)在12%的
收益率下,债券价值=80/(1+12%)+80/(1+12%)^2+80/(1+12%)^3+80/(1+12%)^4+1000/(1+12%)^4=878.51元
在8%的收益率下,债券价值=80/(1+8%)+80/(1+8%)^2+80/(1+8%)^3+80/(1+8%)^4+1000/(1+8%)^4=1000元
(3)若票面利率是15%,要求报酬率为15%,则债券的价值=150/(1+15%)+150/(1+15%)^2+150/(1+15%)^3+150/(1+15%)^4+1000/(1+15%)^4=1000元
要求收益率为8%,债券价值=150/(1+8%)+150/(1+8%)^2+150/(1+8%)^3+150/(1+8%)^4+1000/(1+8%)^4=1231.85元
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