為提升國內會計準則與國際會計準則接軌程度，我國於2007年11月參酌國際會計準則第2號(IAS 2)規定，首次修定財務會計準則第10號公報，明定存貨跌價損失列入銷貨成本。過去研究指出損益表組成項目持續性不同，因此本研究首先欲探討存貨跌價損失的改列對下期盈餘預測力的影響，其次檢測投資人對存貨跌價損失是否存在錯誤評價。
本研究以我國2001年到2006年間有提列存貨跌價損失之上市公司為研究對象，實證結果顯示存貨跌價損失之持續性顯著低於營業損益持續性；而存貨跌價損失改列對下期盈餘預測力並無顯著的影響。有關投資人對存貨跌價損失持續性評價方面，在整體樣本中投資人有錯誤評價，進一步分析產業差異，發現在電子業中，投資人並未存在錯誤評價，而在非電子業中，投資人對存貨跌價損失持續性存在錯誤評價。

To enhance the level of convergence with International Accounting Standards, Taiwan’s Financial Accounting revised SFAS No.10” The Accounting for Invntory” in accordance with IAS 2 in November 2007. Before the revision, the inventory valuation loss usually belongs to non-operating income. The Revised Taiwan’s SFAS No.10 asks reclassification of the inventory valuation loss from non-operating item to the cost of goods sold. Prior literatures indicate that the components of earnings have different persistence; usually operating income is more persistence than non-operating income. Therefore, our first objective is to discuss the effect of future earnings about the reclassification of the inventory valuation loss, and then to examine whether or not the investor misprice the loss of inventory valuation.
For a sample of applying cross-sectional data of firms listed on the Taiwan Stock Exchange (TSE) from 2001 to 2006, the empirical results show that the earnings persistence of inventory valuation loss is lower than earnings persistence of operating income, and don’t show that the operating income has different earnings predictability before and after revised. The empirical results show that investor misprice the persistence of inventory valuation loss in the whole sample. We also analysis the impact of industry, though in electronics indrstry, investor does not misprice the persistenc of inventory loss, but mispricing the persistence of inventory loss in non-electronics industry.

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