Reviled by Argentina and debt forgiveness groups as "vultures", Aurelius Capital Management and another hedge fund, Elliott, have long pressed Buenos Aires for full repayment on its sovereign debt, including the seizing of national assets, and last year triggered a fresh default. The source said Aurelius had been buying Ukrainian bonds including some that mature in the remaining months of 2015. The bonds plunged in price to lows of around 35 cents in the dollar earlier in the year when an unilateral default looked probable but are now trading at around 78 cents. "It's Aurelius. They have been accumulating the...