假设两种资产的相关系数为0.45,计算一半资产A和一半资产B的投资组合的期望利率及标准方差。
第2题
A.0.48%
B.4.8%
C.48%
D.无法计算
第3题
分别计算A、B两种风险资产的平均收益率和风险度。
第4题
A.ρ的取值为正表明两种证券的收益有同向变动倾向
B.ρ的取值总是介于-1和1之间
C.ρ的值为负表明两种证券的收益有反向变动的倾向
D.ρ=1表明两种证券间存在完全的同向的联动关系
E.ρ的值为零表明两种证券之间没有联动倾向
第6题
请计算6个月范围内要使两种债券有相同的美元总收益,加拿大国债必需的期望价格变动。假设美国债券的收益率保持不变。
第7题
支付 | ||
资产 | 多雨夏天(美元) | 干燥夏天(美元) |
A.一家雨伞店的股份 | 8 | 4 |
B.一家太阳镜店的股份 | 4 | 6 |
C.一家钢铁工厂的股份 | 5 | 5 |
假设你的效用U等于预期回报职减去一定系数乘以回报的可变性,即
U=ER-B×回报的可变性
其中,预期回报ER是两种可能结果的平均,可以通过如下方式计算回报的可变性VR:
VR=0.5×(如果多雨的回报-ER)2+(如果干燥的回报-ER)2
如果B为零,则你属于风险中性型。如果B为正值,则你属于风险规避型(也即如果B=1,则你属于风险规避型)。
第8题
A.认为零假设错误
B.认为零假设正确
C.接受零假设
D.拒绝零假设
第9题
第10题
A.拒绝零假设
B.接受零假设
C.认为零假设正确
D.认为零假设错误
第11题
假设你选择了3项资产组合(A.B.C),其预期收益分别是0.08,0.09,0.10,他们的标准差分别是0.04,0.06,0.08,这项资产组合包括40%的A资产,40%的B资产,20%的C资产,A与B的相关系数为0.6,A与C的相关系数为0.4,B与C的相关系数为0.3。 a.该资产组合的预期收益及风险为多少?与仅持有资产C比较。 b.如果将A资产换为一种无风险、收益率为7%的资产,对资产组合的预期收益和风险的影响怎样? c.如果将A资产换为一种预期收益率为11%。标准差为0.1,且与资产B和C无相关性的证券,对资产组合的预期收益及风险有何影响?在资产组合中,你倾向于持有该证券还是资产A? Suppose you select a portfolio of three assets(A,B,C)in which the expected returns are 0.08,0.09,and 0.10,respectively;their standard deviations are 0.04,0.06,and 0.08;the portfolio consists of 40 percent of asset A,40 percent of asset B,and 20 percent of asset C;and the correlation coefficient between A and B is 0.6,between A and C is 0.4,and between B and C is 0.3. a.What is the expected retum and risk of the portfolio?How does this compare with a portfolio that consists only of asset C? b.Suppose that you replace asset A with a risk-free asset having a 7 percent yield.How doesthis affect expected retum and risk? C.Suppose,instead,that you replace asset A with a security having an expected return of 11percent,a standard deviation of 0.10,and no correlation with assets B and C.How does this affect the portfolio’s risk and expected retum?Would you rather have this or asset A in our portfolio?