给出了当目标收益率满足一定条件时，空头和多头套期保值的最优套期比公式。
In addition, the optimal hedging ratios for short and long hedging are obtained when the target rates satisfy…
导出新的套期保值率及其相应的套期保值总风险，空头套期保值风险和多头套期保值风险。
We get new hedging ratios, total risk of hedging, short hedging risk and long hedging risk.
多头套期保值：如果要在未来某时买入某种资产，则可采用持有该资产期货合约的多头来对冲风险。
Long hedge: if a company plans to buy assets at some time in the future, it can hold a long position in the futures contract of the assets to offset the risk.
多头套期保值：如果要在未来某时买入某种资产，则可采用持有该资产期货合约的多头来对冲风险。
Long hedge: if a company plans to buy assets at some time in the future, it can hold a long position in the futures contract of the assets to offset the risk.
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