| 28. | Fair value estimation | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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A number of the Group's accounting policies and disclosures require the measurement of fair values. The Group uses appropriate valuation techniques when sufficient data are available to measure fair value, maximising the use of relevant observable inputs and minimising the use of unobservable inputs. Refer to note 1.20 for the accounting policy and valuation of these financial instruments. The Group's assets and liabilities that are measured at fair value are classified into different levels based on the extent that quoted prices are used in the calculation of fair value and the levels have been defined as follows:
The following table presents the fair value measurement hierarchy of the Group's assets and liabilities measured at fair value:
The following valuation techniques are used in measuring Level 2 and Level 3 fair value for financial instruments: Level 2 are based on quoted market metal prices and exchange rates. Level 3 instruments are determined with a discounted cash flow model using risk-free ZAR interest rate, exchange rates and long-term forecast commodity prices. There were no transfers between fair value hierarchy levels in the current and prior years. There was no change in valuation techniques compared to the prior year. Reconciliation of level 3 financial assets The table below sets out the reconciliation of financial assets that are measured at fair value based on inputs that are not based on observable market data (level 3):
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