请问这是哪个知识点

问题如下：

A transaction where a hedge fund enters into a repo by taking a short position in a security with a view that its price will decline relative to the price of another security held is best described as:

选项：

A.

a reverse repo.

B.

a triparty repo.

C.

financing the ownership of a security.

解释：

A is correct. When viewed from the perspective of the security buyer (cash lender), a repo transaction is referred to as a reverse repurchase agreement or reverse repo. B is incorrect because under a triparty repo, both parties agree to use a third-party agent for the transaction. C is incorrect because financing the ownership of a security is not the purpose undertaken by the hedge fund.