台灣上市櫃公司自2013年起強制適用IFRSs，行政院金融監督管理委員會（金管會）要求公司於ROC GAAP轉換至IFRSs期間（2012年）須同時提供以ROC GAAP及IFRSs為基礎之財務報表資訊。本文檢驗台灣由ROC GAAP強制轉換制IFRSs期間綜合損益的攸關性是否存在差異。本文並未發現IFRSs與ROC GAAP下其他綜合損益之差異數具顯著增額價值攸關，IFRSs與ROC GAAP下其它綜合損益－備供出售金融資產未實現損益差異數僅於上市公司子樣本中具顯著增額負向之價值攸關，而由ROC GAAP轉換至IFRSs盈餘調節數則具顯著增額評價攸關。
All Taiwan listed companies have adopted IFRSs since 2013. The Financial Supervisory Commission required financial information to be prepared based on both ROC GAAP and IFRSs in 2012. This paper examines whether relevance of comprehensive income changed during the mandatory transition from ROC GAAP to IFRSs in Taiwan. The empirical results include four parts: (1) under IFRS and ROC GAAP, the difference of other comprehensive income (OCI) is not incrementally value-relevant (2) only in the sub-sample, the incremental valuation of unrealized income on available-for-sale financial assets differences between IFRSs and ROC GAAP is significantly negative; (3) the adjustment in earnings is incrementally value-relevant, and the earning under ROC GAAP is significantly more value relevant than under IFRSs, the book value of equity under IFRSs is significantly more value relevant than under ROC GAAP and (4) in the earning-return equation models, the difference of OCI under IFRSs and ROC GAAP is incrementally value-relevant in the sub-sample of OTC companies.