MNB policymakers have said the central bank "normally" determines the one-week deposit rate on a monthly basis – after monthly policy meetings – but it stands ready to "respond quickly and flexibly" by setting the rate "if warranted by short-term risks in financial and commodity markets".

On Monday, the forint weakened close to 403 to the euro, a new historical low.

At their last monthly policy meeting, on May 31, the MNB's Monetary Council said the base rate – which now stands at 5.9% – would gradually catch up to the level of the one-week deposit rate "in the coming months".