不同风险收益特征
Different risk-return characteristics
以上为机器翻译结果，长、整句建议使用 人工翻译 。
研究发现，在不同约束条件和不同时间区间下，最优资产配置不尽相同，但其收益-风险特征均优于市场组合。
It found out that the results were quite different in different constraints and different time intervals, but their riskreturn features were all superior to the general market portfolios.
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