‘Turnover’ refers to all foreign exchange transactions in Australia, and is measured in terms of the nominal or notional amount of the contracts. The data are compiled from a survey of financial institutions authorised to deal in foreign exchange in Australia. From March 1998, figures reflect all deals struck in Australia, irrespective of where deals may be booked. From March 2007, the data are based on information supplied by dealers at the end of the calendar month and averaged by the number of working days in the month. Previously, information was supplied by dealers on the last Wednesday of the month. From 2013, the data are collected on a quarterly basis, rather than monthly. Data are now daily averages of foreign exchange turnover for the months of January, April, July and October.