The Czech National Bank surveys average daily turnovers on the foreign exchange market four times a year (in January, April, July and October) for its own purposes and also for international financial institutions - the European Central Bank (ECB) and the Bank for International Settlements (BIS). The survey always lasts one week. Banks and branches of foreign banks having a banking licence in the Czech Republic and operating on the Czech foreign exchange market take part in the survey. In addition to total foreign exchange market turnover, the CNB monitors the shares of individual instruments by type.

The CNB discloses information on average daily turnovers in aggregated form. The aggregated values are a simple sum of the data from each bank, except for the category "transactions with other market-makers in the Czech Republic", where each transaction is reported simultaneously by two survey participants and the total sum in this category is therefore divided by two.

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