Abstract :
This research aims to analyze the differences in stock returns before and after the religious holidays and national holidays in the composite Stock Price Index in the Indonesia Stock Exchange 2009-2011 period
The variables used are the stock returns with stok returns one day before the religious holidays, stock returns one days after the religious holiday, stock returns one day before national holidays, and stock returns one day after a national holiday. The method of analysis used in this research were sampe t-test.
These result prove that stock returns before than after religious holidays are lower significant, in stock return before than after this national holidays are lower accepted but not significant, in stock returns before religious holidays than before national holidays are lower not significant, and in stock returns after religious holidays and after a national holiday are lower not significant
Key words : return before holiday, return after holiday, religious holiday,and national holidays