套期保值者（hedgers)指那些通过放弃部分潜在收益来降低风险的人。
套期保值者有责任注意外的样品性能，但没有样品性能已经发生了。
Hedgers are liable to pay attention to out-of-sample performance but not in-sample performance already occurred.
套期保值者利用期货市场保护其现货业务，以回避对其业务获利底线形成负面影响的不利价格波动。
Hedgers use the futures market to protect their businesses, from adverse price changes that could negatively impact the bottom-line profitability of their businesses.
其基本思想是将现货市场价格的波动性转化为基差波动性风险，这也是套期保值者进行套期保值操作的理论依据。
The basic idea is changing the spot market into the risk of basis risk. It is also theory gist of hedging operation.
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