According to a new study on alternative investing produced by risk management firm Riskdata, 30% of highly illiquid hedge fund strategies are taking advantage of the impossibility of obtaining objective net asset value figures. Take Bear Stearns. When Bear Stearns High-Grade Structured Credit Strategies Enhanced Leverage hedge fund posted an 18.97% decline in April, investors were taken aback. Up to that point, the fund had seemed to be performing somewhat averagely, but there was little to indicate that huge swings in performance were on the horizon. In the first four months of its existence, the fund posted a cumulative 4.44% return. Up to April, the fund was then down 4%, and even in April Bear Stearns said it was expecting a loss of 6.5% for the month nowhere near the almost 19% loss...