BIST to Reclassify 30 Stocks in Q4 2025

Borsa İstanbul announced that it will adjust the index positions of 30 stocks in the fourth quarter of 2025. The changes will affect core indices such as the BIST 100, BIST 200, and BIST 300. These index reclassifications may directly influence how the affected stocks are tracked by index funds and ETFs. Criteria such as market capitalization, trading volume, and sector weighting—key factors in fund management—could necessitate rebalancing. For investors, the most critical consideration is the need to restructure portfolios in line with the new index allocations. The index shift may increase the proportion of certain stocks purchased by index funds while reducing exposure to others. Investors are advised to monitor these developments closely and review their portfolios accordingly. This is not investment advice.