BİST100 ENDEKSİ İLE POLİTİKA FAİZİ ARASINDAKİ FOURİER EŞBÜTÜNLEŞME İLİŞKİSİ.

The relationship between the interestrate and stock pricesis a frequently discussed topic in the economics literature. Estimating the direction and size of the interaction between two different investment instruments is very important for economic decision units. Central banks of developing countries such as Turkey attach great importance to maintaining the optimal balance between stock returns and interest rates. This subject, which was first investigated with linear econometric time series analysis, then started to be investigated with current nonlinear techniques. The use of non-linear techniques by the economic reality is important to determine the relationship between the variables in a healthy way. In this study, the Central Bank weighted average funding cost is used for policy interest rate, and Ise100 price index data is used for the stock price. The study was carried out using monthly data between the years 2011-2023. The relationship between stock prices and interest rate Banerjee et al. (2017) Fourier ADL cointegration test was used. First of all, it was determined that both variables were I(1), and then the cointegration relationship was tested. According to the study's findings, a long-term cointegration relationship was determined between the interest rate and the Ise100 index. Based on the cointegration relationship found, the long-term coefficients were estimated with the FMOLS model. In this context, it has been determined that the 1% increase in the interest variable causes a decrease of approximately 55 points in the BIST100 index. [ABSTRACT FROM AUTHOR]