過去文獻研究指出遞延所得稅資產備抵評價(簡稱DTA備抵評價)的變動揭露，可傳遞公司DTA金額、實現可能性及其未來課稅所得性質與金額等資訊內涵給投資人。管理當局也能透過備抵評價所擁有的會計裁量權進行盈餘管理。以上兩種觀念顯示DTA備抵評價具有正反兩種相對性效果，此種見解與過去文獻對DTA備抵評價僅強調盈餘管理的負面解讀有所不同。而DTA備抵評價亦代表公司未來課稅所得中會有50%以上無法實現，此種訊息反應公司未來盈餘數字會減少，藉由市場的傳遞，有關公司DTA金額、實現可能性及公司未來課稅所得性質與金額會「領先」反應在公司當期的股價中，是謂股價資訊性。

　　因此，本文採用「事件研究法」檢視DTA備抵評價之資訊效果與資訊特質，與「橫斷面迴歸分析法」檢視DTA備抵評價之股價資訊性，以探討DTA備抵評價對資本市場上的股價反應，俾瞭解市場投資人是否洞悉DTA備抵評價所具有的會計意涵。

　　本文實證結果彙總如下：(1)透過市場上的股價反應，DTA備抵評價變動揭露確實傳達有價值的資訊給投資人，惟其揭露方向不同對累積異常報酬並無顯著差異；(2) DTA備抵評價金額變動之資訊特質與累積異常報酬確實具有顯著關係；(3)在控制盈餘管理有關之股價變動後，DTA備抵評價變動仍可及時提供DTA金額、實現可能性與公司未來課稅所得性質及金額之資訊特質給投資人；(4) DTA備抵評價變動確可傳遞公司未來獲利能力，使公司未來盈餘資本化到股價中，惟其揭露方向不同對未來盈餘資本化程度並無顯著差異。本文希望這些研究結果可提供管理當局重新思考DTA備抵評價之會計裁量權，及其資訊特質間的「並存效果」(co-existing effect)，俾更允當認列DTA備抵評價金額，並傳遞攸關資訊給市場投資人。

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