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Ounce oz. Fund off axiom
在所有有风险资产组合的有效组合边界上,任意两个分离的点都代表两个分离的有效投资组合,而有效组合边界上任意其他的点所代表的有效投资组合,都可以由这两个分离的点所代表的有效投资组合的线性组合表示。