Exim Bank has raised $500 million by selling bonds to offshore investors. The bond has a tenure of five-and-a-half years offering a yield of 3.961 per cent. The issue was rated as BBB- by rating company S&P. Investors across Asia, Europe and the US have subscribed this issue. Asian investors' subscription was to the tune of 62 per cent while European investors bought 33 per cent of the stake.