The target rate is introduced as the boundary used to judge whether profit or loss will be achieved for hedging.The optimal futures hedging strategy model based on the improved ratio between profit and risk is set up,which makes the profit rate exceed the target rate.The optimal hedge ratio is derived and analyzed theoretically,and compared with the traditional hedging ratio.The judged part is gained.In addition,the optimal hedging ratios for short and long hedging are obtained when the target rates satisfy...