37. Derivative financial instruments
| Financial assets | 31.12.2022 | 31.12.2021 |
|---|---|---|
| Currency forward contracts hedging cash flows | 1,188 | 3,427 |
| Futures contracts hedging cash flows related to the purchase of aluminium | 1,066 | 5,247 |
| Total | 2,254 | 8,674 |
| Financial liabilities | 31.12.2022 | 31.12.2021 |
| Currency forward contracts hedging cash flows | 3,977 | 1,865 |
| Futures contracts hedging cash flows related to the purchase of aluminium | 2,260 | 945 |
| Total | 6,237 | 2,810 |
Currency forward and futures contracts for the purchase of aluminium are measured either on the basis of the stock exchange quotations or, in the case of the lack of such quotations, by discounting values based on the forward rate resulting from the contract and deduction of the amount in the given currency translated at the current exchange rate.
In the event of the application of the discounted cash flows method, the estimated future cash flows are based on the most reliable Management Board estimations, whereas the market interest rate for a similar instrument is applied as the discount rate as at the balance-sheet date. In the event of the application of other valuation models, the output data are based on the market data as at the balance-sheet date.