Indonesia Conference Directory

The purpose of this study was to find evidence of whether World Inflation and Crude Oil Prices had an effect on the Composite Stock Price Index (CSPI) in the Indonesian Stock Exchange (IDX) of the 2015-2018 period by taking samples for 4 years on the IDX. This research method used descriptive and verification through a quantitative approach. The design of the analysis used is multiple linear regression using secondary data, while the hypothesis testing uses T-Tests and F-Tests. The findings of this study were fluctuations between inflation, world crude oil prices, and the Composite Stock Price Index (CSPI) in each year. Statistical analysis proves that simultaneously Inflation and World Crude Oil Prices have an effect on the Composite Stock Price Index (CSPI). While partially shows that inflation affects the Composite Stock Price Index (CSPI) and World Crude Oil Prices affect the Composite Stock Price Index (CSPI). When income increases, prices become expensive and buying the community or company for the goods becomes less and will increase the profits earned by the company a little and also investors are reluctant to invest in the company. Determine, the compilation of oil prices increases, the mining companies are in great demand because the number of oil demanders by the community will help increase the companys profits and also investors will invest more in these companies and of these two things will increase in the increase and increase in the Composite Index types every day and seconds that can help towards economic development in Indonesia.