Hedge Fund - ZWEIG DIMENNA PARTNERS

Martn Zweig and Joe DiMenna founded Zweig-DiMenna Associates in 1984. Zweig-DiMenna returned around 90% between 2006 and 2010. However, their recent performance isn't great. In 2008, their loss was nearly 6%- which is much better than an average hedge fund’s. In 2009, they lost 3.5% when everybody else was recouping their 2008 losses. Over the first 11 months of 2010, their loss was close to 3%.

Zweig-DiMenna usually have a gross long exposure of 95% and a gross short exposure of 40%. So they’re 55% net long on the average. They say their long bias usually range between 25% and 85%. Considering they had 180 stocks in their 13F portfolio and probably short sell a similar number of companies, clearly they aren’t placing their bets randomly. They systematically manage to buy the losers and sell the winners during the past couple of years.