两者都属于私募股权基金涉及的种类。

私募股权基金们涉足的业务有很多，既包括专门投资处于早期发展阶段企业的风险投资商（VC，即Venture Capital，如日本软银投资）；又包括专门投资股价严重扭曲的上市企业的收购基金（Buyout Fund），比如投资徐工机械的凯雷集团旗下的收购基金；

Buyout fund收购基金

是私募股权基金的一个重要分支,用于并购企业,获得标的企业的控制权或参股,再通过重组、改造和经营等方式,实现企业上市或者出售股权,从而获得丰厚的收益。

A buyout fund is a means by which investors can purchase equity in a private company that is not listed on a stock exchange. Such deals often involve both refinancing of a company and a significant structural change. In many cases, a buyout fund will make use of leverage, meaning the main organization behind the buyout does not provide all the financing.

还包括以提供企业上市或收购兼并前短期过桥贷款的夹层投资基金(Mezzanine Fund）和以处于偿还危机中的债券为主要投资标的的秃鹫基金（Vulture Fund）。

vulture hedge fund秃鹫基金

秃鹫基金指的是那些通过收购处于偿还危机中公司的违约债券，然后进行恶意诉讼，谋求高额利润的基金。有时也泛指那些买卖破产倒闭公司股权、债权、资产而获利的私募基金。秃鹫基金通常喜欢购买陷于困境的公司债券，等公司无法偿付的时候，就开始打官司索取巨额赔偿。

A vulture fund is a hedge fund, private-equity fund or distressed debt fund, that invests in debt considered to be very weak or in default, known as distressed securities.[2] Investors in the fund profit by buying debt at a discounted price on a secondary market and then using numerous methods to subsequently sell the debt for a larger amount than the purchasing price. Debtors include companies, countries, and individuals.

以下为相关双语示例，供参考：

That's what a source close to Bain Capital tells me about David Toll, who today reported that the Boston-based firm would offer investors a greater share of the profits on its next mega-buyout fund.

接近贝恩资本（Bain Capital）的一位消息人士这样对我评价戴维•托尔。 托尔日前表示，总部位于波士顿的贝恩资本将在下次募集大型收购基金时为投资者提供更高比例的利润。

Further, vulture fund litigation and freezing of the assets of debtor countries in the course of such litigation jeopardizes the servicing of debt obligations by the affected countries.

此外，秃鹫基金诉讼和在此 类诉讼期间冻结债务国财产的做法会阻碍受影响国家履行偿债义务。