... mode selection方式选择;[电]模态选择 portfolio selection组合证券投资选择;[经]笼统投资选择 seed selectionn.选种 ...
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针对预期收益率与风险损失率为模糊数时,建立了一种具有模糊系数的证券组合投资选择模型。
A optional model of portfolio investment with fuzzy-coefficient in which profit rates and risk rates are fuzzy Numbers is presented in this paper.
Because we hold relatively stable, relatively well-diversified portfolios, security selection turns out not to be an important determinant of returns for most investors and market timing turns out not to be an important determinant of returns.
因为持有相对稳定,和相对分散的投资组合,证券选择不再是,决定投资者回报率的重要因素,而市场时机选择,也不会成为决定回报率的重要因素
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