Quam Asset Management pulled further ahead of the pack as its Quam China Focus Segregated Portfolio continued to be the top performing fund of 2015, with 59.71% returns through May 31 up from 52.09% a week earlier, according to this week’s HSBC Hedge Fund Weekly. The rest of the top five shuffled around during the week, with Russian Prosperity Fund – A dropping from second to fifth (YTD returns fell from 31.47% to 24.87%), and Perceptive Life Sciences jumping from tenth to second (YTD returns up from 17.56% to 29.71%). The rest of the top five at the end of…