因为阿诺特先生和卫斯特先生预测大盘组合的年周转率仅有10%。
Messrs Arnott and West estimate the annual turnover of a large-cap portfolio should be just 10%.
换言之，所有声称能够准确预测大盘走势的人不是骗子就是自欺欺人。
In other words, all claim to be able to accurately predict market trend is self-deception of the people are not liars.
而且，交易成本将不会有那么的高；因为阿诺特先生和卫斯特先生预测大盘组合的年周转率仅有10%。
And trading costs should not be that high; Messrs Arnott and West estimate the annual turnover of a large-cap portfolio should be just 10%.
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