This study aims to determine the effect of inflation, interest rates, and the exchange rate of the dollar (USA) on the LQ45 stock price index. Data collection techniques are a method of Documentation. For test instruments using classic assumption tests and tests Statistics. Data analysis techniques using some linear regression for variables using four variables, test F and test t. The results showed that variable inflation (X1), interest rate (X2), and exchange rate (X3) simultaneously LQ45 stock price index on the Indonesia Stock Exchange (Y).
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