(v)Derivative Financial Instruments
The Group recognizes derivative financial instruments as either assets or liabilities in the consolidated statements of financial position and measures such instruments at fair value. The accounting for changes in the fair value of a derivative financial instrument depends on the intended use of the derivative financial instrument and the resulting designation. For a derivative financial instrument designated as a cash flow hedge, the effective portion of such derivative’s gain or loss is initially reported as a component of other comprehensive income or loss and subsequently reclassified into income when the hedged exposure affects income. The ineffective portion of the gain or loss is reported in income immediately. For a derivative financial instrument designated as a fair value hedge, the gain or loss is recognized in income in the period of change together with the offsetting loss or gain on the hedged item attributed to the risk being hedged. When a hedging instrument expires or is sold, terminated or exercised, the cumulative gain or loss on the hedging instrument that has been recognized in other comprehensive income remains in equity until the forecast transaction occurs. When a forecast transaction is no longer expected to occur, the cumulative gain or loss that was reported in equity is immediately reclassified to income or loss. For derivative financial instruments that are not designated as accounting hedges, changes in fair value are recognized in income in the period of change. During the years ended December 31, 2017, 2016 and 2015, certain derivative financial instruments qualified for hedge accounting (see Note 14).