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【多选题】
市场投资组合是()。A.
收益率为正数的资产构成的组合，
B.
包括所有风险资产在内的资产组合，
C.
由所有现存证券按照市场价值加权计算所得到的组合，
D.
一条与有效投资边界相切的直线，
E.
市场上所有价格上涨的股票的组合
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