金融市场具有高度的防御机制，因此任何交易策略要想长期盈利，必须是微利的，甚至忍受较大的回撤，较低的收益风险比。否则，对于一个高收益风险比的系统，市场就会自动摧毁之，使其无法长久。这也是为什么很多经过过度优化拟合而做出的交易策略始终无法获利的根本原因。
我的理解：任何有超额利润的地方，资本必追捧，最终导致利润率下降，回到大众水平。🙂所以真正能赚钱的都是闷声发大财。🤫
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