该债券理论价格=1000*8%/(1+12%)+1000*8%/(1+12%)^2+1000*8%/(1+12%)^3+1000*8%/(1+12%)^4+1000*8%/(1+12%)^5+1000*8%/(1+12%)^6+1000*8%/(1+12%)^7+1000*8%/(1+12%)^8+1000*8%/(1+12%)^9+1000*(1+8%)/(1+12%)^10=773.99元
久期=[1*1000*8%/(1+12%)+2*1000*8%/(1+12%)^2+3*1000*8%/(1+12%)^3+4*1000*8%/(1+12%)^4+5*1000*8%/(1+12%)^5+6*1000*8%/(1+12%)^6+7*1000*8%/(1+12%)^7+8*1000*8%/(1+12%)^8+9*1000*8%/(1+12%)^9+10*1000*(1+8%)/(1+12%)^10]/773.99=6.837年
修正久期=6.837/(1+12%)=6.1年
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