To prevent a strengthening of the hryvnia, the central bank bought a net $335.5 million on the interbank market in December. By contrast, during the whole year, the bank bought a net $1.1 billion, reports the National Bank of Ukraine. The Bank intervenes to prevent exchange rate volatility. The 2021 budget is predicated on an average exchange rate this year of UAH 29.1 per dollar, a 3% devaluation from today’s rate of 28.27.