Borsa Istanbul Updates Free Float Ratios for Indices

Borsa Istanbul has updated the free float ratios used in index calculations. The new ratios will take effect as of June 17, 2026. In this context, changes have been made to the shares of several companies, including Kiler Holding, Lila Kağıt, and Ziraat GYO, which may affect their index weights. The free float ratio represents the proportion of a company's publicly traded shares relative to its total capital. Updating this ratio can directly impact the weight of the relevant stocks within the index. Investors should assess the potential implications of these changes on their portfolio allocations. Borsa Istanbul periodically makes such adjustments to ensure that indices reflect an accurate and up-to-date structure. This update is particularly significant for passively managed portfolios, such as index funds and exchange-traded funds. This is not investment advice.