【正确答案】
D
【答案解析】解析:A的预期收益率=0.25×5%+0.5×10%+0.25×15%=10%,方差=0.25×(5%-10%)
2
+0.5×(10%-10%)
2
+0.25×(15%-10%)
2
=0.00125;B的预期收益率=0.5×5%+0.5×15%:10%,方差=0.5×(5%-10%)
2
+0.5×(15%-10%)
2
=0.0025;C的预期收益率=0.25×5%+0.25×10%+0.5×15%=11.25%,方差=0.25×(5%-11.25%)
2
+0.25×(10%-11.25%)
2
+0.5×(15%-11.25%)
2
=0.00171。