The method can be used to transfer market risks and expose the stock package of the hedger and partial profit related to market to the market risk.
采用这种对冲方法，可转移市场风险，仅使对冲者股票组合与市场有关的部分收益暴露于市场风险当中。
2
When the longest holding period of futures contracts is shorter than the hedging period, the hedger has to use two or more futures contracts overlap to hedging for the spot.