第二章
1.
(1)5000×0.386=1930
(2)2000×0.327=654
(3)9000×0.444=3996
(4)4500×0.63=2835
2.
(1)26762000(1i)5(1i)51.338查表得:i=6%(2)102013.61000(1+i)10(1+i)2.0136查表并整理得:i-7%2.01361.9678%7%2.1591.967i7.24%
3.
(1)F130005.63716911F230005.98517955F330006.35319059(2)P130004.32912987P230003.79111373P330003.352100564.
(1)A=50000/15.937=3137.35
(2)A=50000/(18.531-1)=2852.09
9.
5.
5800010000(1i)tt1t(1i)5.8t188查表并整理得:i-7%5.9715.88%-7%5.9715.747i7.76%6.
255005000(115%)tt1t(115%)5.1t1nn查表并整理得:n-105.15.01911-105.2345.019n10.387.
预期报酬率
=(-0.1)×0.15+0.14×0.20+0.20×0.40+0.25×0.25
=0.1555
方差=1.29%
标准差=11.35%
标准离差率=0.1135/0.1555=0.73
8.
A股票期望收益率=(40%+20%+10%+5%+15%)/5=18%
A股票方差
=0.2×(40%-18%)2+0.2×(20%-18%)2+0.2×(10%-18%)2+0.2×(5%-18%)2+0.2×(15%-18%)2=1.46%
A股票标准差=12.08%
B股票期望收益率=(20%+15%+5%+8%+10%)/5=11.6%
B股票方差
=[(20%-11.6%)2+(15%-11.6%)2+(5%-11.6%)2+(8%-11.6%)2+(10%-11.6%)2]/5
=0.28%
B股票标准差=5.29%
A股票和B股票的协方差
=[(40%-18%)(20%-11.6%)+(20%-18%)(15%-11.6%)+(10%-18%)(5%-11.6%)+(5%-18%)(8%-11.6%)+(15%-18%)(10%-11.6%)]/5=0.592%
A股票和B股票的相关系数
=0.592%/(5.29%×12.08%)=0.9264
组合的期望收益率=18%×60%+11.6%×40%=15.44%
组合的方差
=60%×60%×1.46%+40%×40%×0.28%+2×60%×40%×0.592%=0.85%
组合的标准差=9.22%
9.
(1)
A期望报酬率20% 标准差 0.1
B期望报酬率22.5% 标准差 0.175
(2)
AB协方差=-0.0175
相关系数=-1
(3)
组合的期望报酬率=21.25%
组合的标准差=3.75%
(4)
Wa=64%, Wb=36%
(5)
WA=68% WB=32%
10.RA=5%+0.75×(17%-5%)=0.14
RB =5%+0.90×(17%-5%)=0.158
RC=5%+1.40×(17%-5%)=0.218
11.
(1) =2×40%+1.5×30%+0.5×20%+1.0×10%=1.45
(2)假设调整后A股票所占比重为X,则D股票所占比重为Y
2×X+1.5×30%+0.5×20%+1.0×Y=1.15
2X+Y=0.6
同时
X +30%+20%+Y=1
X+Y=0.5
X=0.1
Y=0.4
12.
V=8%×1000×(P/A,7%,10)+1000×(P/F,7%,10)=80×7.024+1000×0.508=1069.6
如果预计市场利率将提高,则愿以更低的价格购买它,如果预计市场利率将下降,愿意以更高的价格购买它。
13.
8%/2=4%
10%/2=5%
V=100000×4%×(P/A,5%,7)+100000×(P/F,5%,7)
=4000×5.786+100000×0.711
=94244>94000
值得购买
5% 94244
I 94000
6% 88828
运用插值法计算R=5.05%
IRR=10.1%
14.
(1)KS=D1/P0+g=1.32×(1+8%)/23.5+8%=14.7%
(2)V=D1/( KS–g)=1.32×(1+8%)/(10.5%-8%)=57(元)
(3) 要求的收益率<股票的预期收益率,应投资该公司股票
15.
(1)V=1.5/(16%-6%)=15(元)
(2)V=1.5×(P/A,16%,3)+1.5×(1+6%)/(16%-6%)×(P/F,16%,3)
=13.6
16.
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