A.-1 B.-0.5 C.0.5 D.1
A.期望收益率為30% B.期望收益率為35% C.估計(jì)期望方差為1.33% D.估計(jì)期望方差為2.67%
A.債券 B.股票 C.風(fēng)險(xiǎn)資產(chǎn) D.不動(dòng)產(chǎn)