Fir Tree Partners continues its winning streak. Firmwide capital has shot up by 215 percent since the then–$4 billion firm’s Hedge Fund 100 debut in 2009, when it tied for the No. 100 spot with Polygon Investment Management. In July 2013, assets topped $10 billion for the first time, thanks to solid gains across Fir Tree’s main hedge fund strategies. Investors are pleased with the multistrategy firm's high returns. Fir Tree earned an A grade on the 2015 Hedge Fund Report Card, making it the 11th-ranked hedge fund firm overall. Investors gave the firm an A for…