NO.PZ2020012001000021
问题如下：
When should (a) a short hedge and (b) a long hedge be used?
选项：
解释：
A short hedge should be used when an asset will be sold in the future. A long hedge should be used when an asset will be purchased in the future.
Short futures means 由于assst被高估，未来价格会下跌，于是卖空，即卖出现货，获得资金，未来价格下跌买回资产。
long反之同理，
这样理解对吗？
