過去研究顯示股價崩跌主要導因於資訊不對稱，而會計師有效提升查核品質可以有效降低公司與投資大眾間資訊不對稱的情形，故本研究從會計師查核角度，探討異常查核報告日延遲與未來股價崩跌風險的關係，本研究使使用2004年至2019年美國上市公司樣本，實證結果顯示，異常查核報告日延遲與未來股價崩跌風險呈負相關，亦即異常查核報告日延遲顯示會計師會收集更多證據減少客戶隱匿壞消息的可能性，進而降低未來股價崩跌的可能性。

The prior literature shows that the stock price crash is mainly due to information asymmetry. The effective improvement of the quality of the audit by accountants can effectively reduce the information asymmetry between the company and investors. Therefore, this paper is different from the past research from the perspective of the accountant's verification, which studies the relationship between abnormal audit report lags and future stock price crash risk. The sample of this study is U.S. listed companies from 2004 to 2019, and regression statistical methods are used to test the relationship between abnormal audit report lags and future stock price crash risk. The empirical results show that abnormal audit report lags are negatively correlated with future stock price crash risk. That is, abnormal audit report lags mean that accountants collect more evidence to reduce the possibility of customers hiding bad news, therefore reducing the risk of future stock price crashes.

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