作为有效的套期保值手段，合约交换需要有一定程度的特化。
To be useful hedges, swaps need to have a degree of specialisation.
期权交易市场为投资者提供了一种保值手段，通过买卖齐全他们可以保护自己在特定证券的地位。
Options trading market for investors with a hedge against inflation means they can protect themselves through the sale of complete in a particular stock status.
期权交易市场为投资者提供了一种保值手段，通过买卖齐全他们可以保护自己在特定证券的地位。
Options is a contract in which the contract within a specified period of time to set prices above a certain power purchase or sell the rights.
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