The purpose of this study to examine the effect of BI Rate, FED Rate, and Kurs Rupiah simultaneously, partially, and dominant variabels affect on Composite Stock Price Index by using multiple linier regression analysis. This study uses data monthly of January 2008 to December 2015 with 96 sample of data time series for each independent and dependet variabel. Simoultan analysis shows BI Rate, FED Rate, and Kurs Rupiah significantly affect Composite Stock Price Index. Partial analysis shows: first, BI Rate affect negative on Composite Stock Price Index; second, FED Rate does not affect Composite Stock Price Index; third, Kurs Rupiah affect negative on Composite Stock Price Index. Variables dominant affect on Composite Stock Price is variable Kurs Rupiah. The finding in this study idicate the diversity information about changes in FED Rate so that investors tend to be confident on the self evaluation to decide on stock investing.