Steven Tananbaum, CIO and co-founder of GoldenTree Asset Management, has fought hard to return his New York-based hedge fund firm to its pre-2008 form, when assets peaked at $10 billion in early 2009. The firm's flagship fund lost 38.6 percent in 2008, but rebounded with nearly 70 percent gains in 2009 and 23.6 percent gains in 2010. Money consistently trickled out of the funds for three years following the market meltdown, however, and sunk to a $6.7 billion low at the end of 2011. But the doom days seem to be over: GoldenTree has grown its hedge fund asset pool by…