貿易通2019 年年報

Report of the Auditors (Continued) 核數師報告書 （續） Tradelink Electronic Commerce Limited Annual Report 2019 96 Key audit matters (Continued) Loss allowance of debt securities measured at fair value through other comprehensive income 透過其他全面收益按公允價值計量的債務證券虧損撥備 Refer to note 18 to the consolidated financial statements and the accounting policies on pages 122 to 123. 請參閱綜合財務報表附註 18 及於第 122 頁至第 123 頁的會計 政策。 The Key Audit Matter How the matter was addressed in our audit 關鍵審計事項 我們的審計如何處理該事項 The Group invests in corporate bonds to earn interest income as part of the Group’s cash management strategy, which is governed by the investment guidelines approved by the investment committee of the Group. As at 31 December 2019, the Group held a portfolio of debt securities measured at fair value through other comprehensive income (“FVOCI”) with a fair value of HK$318 million. The Group measures loss allowance of debt securities using the expected credit loss (“ECL”) model, which requires an ongoing measurement of credit risk associated with a financial asset. It is subject to a number of key parameters and assumptions, including the estimates of probability of default, loss given default and discount rate, adjustments for forward-looking information and other adjustment factors. Management judgment is involved in the selection of those parameters and the application of the assumptions. 貴集團投資企業債券以賺取利息收入，作為 貴集團現金 管理策略的一部分，該策略受 貴集團投資委員會批准的 投資指引所規管。於二零一九年十二月三十一日， 貴集團 持有透過其他全面收益按公允價值計量（「 FVOCI 」）的組合 債務證券，其公允價值為港幣 318,000,000 元。 貴集團透過預期信貸虧損（「 ECL 」）模式計量債務證券的虧 損撥備，有關模式要求持續計量與財務資產相關的信貸風 險，其中牽涉多項主要參數及假設，包括違約機率、違約 虧損及貼現率、前瞻性資料的調整及其他調整因素。篩選 該等參數及應用假設涉及管理層判斷。 Our audit procedures to assess the loss allowance for debt securities measured at FVOCI included the following: • obtaining an understanding on the key parameters and assumptions of the ECL model adopted by management, including the basis of the segmentation of the debt securities based on credit risk characteristics, the historical default data, and the assumptions involved in management’s estimated loss rate; • evaluating the appropriateness of the key parameters and assumptions adopted in the calculation of loss allowances by comparing against historical default data and seeking collaborative evidence from external sources; 我們用於評估透過其他全面收益按公允價值計量的債務證 券虧損撥備的審計程序包括： • 瞭解管理層採用預期信貸虧損模式的主要參數及假設， 包括根據信貸風險特性分類債務證券的基準、歷史違約 數據以及管理層預測虧損率所用的假設； • 比較歷史違約數據，以評估計算虧損撥備所採用的主要 參數及假設的合適度，並自外部資源蒐集佐證； 關鍵審計事項（續）