Through hedge model to determine the hedge ratio can improve the hedge efficiency and effectively averse the risk of cash markets.

通过套期保值模型合理确定套期保值比率，可以提高套期保值效果，有效规避现货价格的风险。

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While in two year before the crisis, the model composed by AZ, BC and BB (current liability coverage ratio by the operational cash) shows an errordifferentiation ratio at 14.52%.

在危机发生前两年，由AZ、BB（流动负债经营现金保障系数）、BC三项指标构成的模型误判率为14.52%。

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The cash dividend payout ratio is particularly useful for evaluating the staying power of dividends from companies undergoing massive business model overhauls.

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