This is a preliminary study on stock overreaction behavior of syariah compliant stock in Bursa Malaysia over the period between January 1988 and December 2009. Results show that syariah compliant stock in Bursa Malaysia, like their conventional counterparts overreact. The overreactions are more pronounced during the sub-period prior to 1997 Asian Financial Crisis and Global 2008 Crisis. After the crisis the overreaction behavior seems to diminish.