In addition to offering bonds, some of the larger forex brokers also offer traders the chance to trade interest rates directly in the form of CFDs on a selection of interest rate futures. The trader is then taking a position on the future changes in short-term interest rates for different countries and regions, such as the Australian 30-Day Interbank Rate or the Euribor 3-Month Rate.
Interest rate CFDs are instruments with fixed expiry dates, that needs to be rolled over or closed out at the expiry date. The brokers that offer this can provide more information on how this is done in practice. Since interest rate futures is a more advanced trading product, only a handful of the largest forex brokers in the world have chosen to offer this to their retail clients.