Howard Marks of Oaktree Capital said US interest rates would be in the 3-4 per cent range after the Fed cut rates. Mr. Marks, co-chairperson and co-founder of Oaktree Capital, told a conference in Melbourne on Thursday that the Fed would cut rates from 5.25 per cent, 5.5 per cent in an emergency to the 3 per cent line. He also stressed that he believed rates would remain at the 3 per cent line and would not return to zero, 0.5 per cent or 1 per cent.