Then it comes to the Alternative Investment universe not everything is about returns. One important function is the funds correlation towards the general market. An fund that got negative correlation to S&P 500, even if it under perform a bit is a useful building block for institutions.
By adding these non-correlated funds the institution can lower it's total portfolio volatility over time.
That is the fallacy to believe that diversification is more important than total return. So a 5% return on gold is better than 35% return on S&P 500? I do not think so.