The main purpose of the study is to investigate the volatility transfer between the returns of the Euro and the selected indices calculated in Borsa Istanbul. In the study, besides the Euro variable, BIST 100, BIST 30, BIST Bank, BIST Service, BIST Industrial and BIST Tourism indices were used. In the research, daily data for the period of 1 January 2020 - 31 December 2022 were discussed. According to the results of the DCC-GARCH model, it has been determined that the volatility of Euro, BIST 100, BIST 30, BIST Bank, BIST Service, BIST Industrial and BIST Tourism variables is permanent. It has been found that there is a bidirectional volatility transfer between Euro and BIST 100, BIST 30, BIST Industrial indices. In addition, there is a one-way volatility transfer from Euro to BIST Bank, BIST service and BIST Tourism, and it has been determined that there is a positive dynamic conditional correlation between Euro and BIST 100, BIST 30, BIST Bank, BIST Service, BIST Industry.