INVESTORS in fixed deposits (FDs) never had it so good. With the Reserve Bank of India (RBI) lifting the interest rates on FD borrowings of select non-banking finance companies (NBFCs), annual effective yields have jumped to 27.73 per cent (Kotak Mahindra), 29.77 per cent (Reliance Capital) and 30.68 per cent (Apple Industries) on five-year deposits. Even on one-year deposits, effective yield has touched 21 per cent (Enarai Finance). Last week, after some dilly-dallying, Sundaram Finance announced a hike in annual rate from 15 to 17.5 per cent on three-year deposits, giving investors the added option of premature renewals.