US hedge fund Citadel's portfolios all made money in the first five months of the year with the firm's flagship portfolio chalking up a return of 6.14% to the end of May, according to a report by Reuters.

US hedge fund Citadel's portfolios all made money in the first five months of the year with the firm's flagship portfolio chalking up a return of 6.14% to the end of May, according to a report by Reuters.

The report cites a Citadel investor as confirming that founder Ken Griffin's flagship portfolio The Citadel Wellington fund ended the month with a 0.72% gain.

While many hedge funds are still compiling their numbers for May, according to preliminary reports from research firm Hedge Fund Research, the average hedge fund slipped 0.46% last month, with performance roughly flat YTD.

Citadel's Tactical Trading fund is up 7,15% so far this year having out on 0.98% last month, while the firm's Equities fund is now up 7.43% following a 1.25% gain in May. The Global Fixed Income fund meanwhile, is up 2.97% since January, having gained 0.71% last month.