Hedge fund 与传统的投资的correlation低是什么原因？

问题如下：

If an investor wants to add an alternative investment in the portfolio which satisfy below criteria: 1) has low correlation with traditional assets, 2) profit from long and short positions, or profit from pricing discrepancy between related securities:

选项：

a private equity fund.

a hedge fund.

a real estate.

解释：

B is correct.

三个选项中只有Hedge funds 能允许做空，可以采用同时做多、做空的操作；同时Hedge funds 投资策略包括有事件驱动、宏观驱动等多种策略，且整体与传统资产相关性较低。因此，综合来看只有B选项最符合题目的描述。