| (d) | Fair value measurement |
Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value measurement is based on the presumption that the transaction to sell the asset or transfer the liability takes place either:
| • | In the principal market for the asset or liability; or |
| • | In the absence of a principal market, in the most advantageous market for the asset or liability. |
The principal or the most advantageous market must be accessible by the Group.
The fair value of an asset or a liability is measured using the assumptions that market participants would use when pricing the asset or liability, assuming that market participants act in their economic best interest.
The Group uses valuation techniques that are appropriate in the circumstances and for which sufficient data are available to measure fair value, maximising the use of relevant observable inputs and minimising the use of unobservable inputs.
All assets and liabilities for which fair value is measured or disclosed in the consolidated financial statements are categorised within the fair value hierarchy, described as follows, based on the lowest level input that is significant to the fair value measurement as a whole:
| • | Level 1 - quoted (unadjusted) market prices in active markets for identical assets or liabilities; |
| • | Level 2 - valuation techniques for which the lowest level input that is significant to the fair value measurement is directly or indirectly observable; |
| • | Level 3 - valuation techniques for which the lowest level input that is significant to the fair value measurement is unobservable. |
For assets and liabilities that are recognised in the consolidated financial statements at fair value on a recurring basis, the Group determines whether transfers have occurred between levels in the hierarchy by re-assessing categorisation (based on the lowest level input that is significant to the fair value measurement as a whole) at the end of each reporting period.