US and British commercial banks can borrow from their central banks at a rate less than 1 per cent. The equivalent RBA rate is 3.25 per cent and many pundits are forecasting the rate could go to 3.75 per cent before the end of 2009. This will increase the differential between Australian and British and US interest rates and make the scope for speculative profits even higher.
Since the beginning of the year, $64 billion has poured into Australia in the form of direct and portfolio (share) investment and foreign lenders have switched $80 billion of foreign debt payable in foreign currencies to Australian currency. Most of the portfolio investment ($41 billion) has gone into bank shares. Banks now represent 40 per cent of the value of shares traded on the stock exchange, and while shares in the big four bank shares have increased by about 80 per cent (as measured by CBA shares), the Australian Stock Exchange Index has risen by only 30 per cent."