The purpose of this study is (1) to examine market reaction of financial statementâs announcement and to know whether there is a big or small significant difference on Abnormal Return(relationship with before and after SK BAPEPAM-LK No. Kep-431/BL/2012; (2) to examine theinfluences fundamental information variables such as: earning and operating cash flow (OCF) and its influence to stock return (abnormal return). There are 36 sample manufacturing firmslisted in the Jakarta Stock Exchange (BEJ) by means of purposive sampling method. The statisticmethod used to test hypotheses is paired sample test (market reaction from abnormal return) andlinier regression with dummy variable. The result of this study indicates that the market reaction isnot likely to be the same or different around each announcement date of the financial statements ofthe company both before and after the SK BAPEPAM-LK No: Kep-431/BL/2012. Furthermore, theresults of research related to fundamental information in the form of earnings and operating cashflow, shows that earnings have a greater influence on abnormal returns, while operating cash flowno effect on the abnormal return. From these results it can be concluded that the investor ormarket still choose to use earnings in investment decisions.Keyword: market reaction, information fundamental, earning, operating cash flow, cummulativeabnormal return.
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