In late 2008 the National Bank of Australia offered a 5 percent interest rate on a savings account while Bank of America offered 3 percent. This difference means that

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The difference in interest rates between the two countries (5% - 3% = 2%) suggests that people expect the higher-yielding currency (i.e. the Australian dollar) to depreciate by approximately the same amount relative to the lower-yielding currency (i.e. the U.S. dollar), or about 2%. This is in line with the concept of interest rate parity, which suggests that interest rate differentials are offset by corresponding changes in exchange rates in order to equalize returns for investors in different currencies. Therefore, there is likely to be an expectation of U.S. dollar appreciation relative to the Australian dollar, but this appreciation is only likely to be about 2%, not 8%.

In Late 2008 the National Bank of Australia Offered a 5