ABSTRACT The purpose of this study was to determine the effect of inflation, BI Rate, exchange rate, and Standard & Poor's 500 on the composite stock price index (CSPI). The population of this study is all data on the CSPI, BI Rate, Inflation, Exchange Rates and the Standard & Poor's 500 in the 2016-2019 period on the Indonesia Stock Exchange (IDX). The sample of this study was selected using …