1. HF是会有stale price bias,但是并不是它主要的问题。因为HF是月度来计算return的。但对于有些HF,比如以detressed debt等策略,它的收益率计算并不是那么及时的,也会有一些stale price的问题。但总体来讲,不是很重要的bias。 Lack of security trading leads to stale prices for those securities and can cause measured standard deviation to be over- or understated, depending on the time period being studied. As a result, measured correlations may be lower than expected. This issue is not a significant concern in the creation of hedge fund indexes because monthly data are used, and for many hedge fund strategies, the underlying holdings are relatively liquid, so positions reflect market-traded prices.
2. 直接型的房地产投资主要的作用也是一样的,可以提高收益和分散化,其中RE考的更多的是子类别,REITs,它的分散化效果就没有其他另类投资那么好,因为本来也是在股票市场上进行交易的。