Effect of change in energy prices on stock prices: An application on BIST Electricity Endex

In this study, the relationship between the electricity index traded on Istanbul Stock Exchange and energy prices are examined with Nonlinear Autoregressive Distributed Lag Model (NARDL), which can include asymmetric relationships, the direction and coefficiency of the relationship. As the data set, quarterly data between March 2010 and March 2019 were used. BIST Electricity Index (XELKT) was used as the dependent variable; electricity prices (EL), gas prices (GAS) and brent oil prices (BR) were used as independent variables. According to the NARDL limit test results, there is a negative and significant relationship between BIST Electricity Index and gas prices in the long run. Relationship among BIST Electricity Index and electricity prices and brent oil prices is not significant. According to the results of the error correction model, almost all independent variables are correlated with BIST Electricity Index contrary to the long run. In the short term, the relationship between the BIST Electricity Index (XELKT), positif component of electricity prices (EL+) and brent petrol prices (BR) is positive. In the short term, the relationship between BIST Electricity Index (XELKT), negatif component of electricity prices (EL-) and naturel gas prices (GAS) variables may be positive or negative depending on delays.