根据马科维茨的定义，有效组合是指其单位收益的风险最小或单位风险的收益率最大。
Optimizing portfolio is that the least risk in an unit return or the most return in an unit risk on the basic definition of Markowitz.
“红绿灯”软件发出的买卖信号进行操盘的成功率能达到95%以上，使收益最大化和风险最小化得到有效的结合。
"Traffic light" software issued by the sale of Trader signals, the success rate can reach 95%, to maximize revenue and minimize the risk of an effective combination.
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