
BIST Stock Indices are calculated using 2 different methods, Market Cap Weighted or Non-Market Cap Weighted, depending on the weighting theme.\n
BIST Market Cap Weighted Stock Indices have been created to measure the price and the return performances of group of stocks traded on Borsa Istanbul.
\nIn Market Cap Weighted Stock Indices, weight of a stock may change other than price fluctuations like corporate actions or free float ratio changes during index period.##\nBIST Non-Market Cap Weighted Stock Indices have been created to measure the return performances of group of stocks according to index theme where weights determined at the beginning of the index period.
\nIn Non-Market Cap Weighted Stock Indices, weight of a stock may change only as a result of price fluctuations during index period. If free float market value of a stock changes during Index Period for a reason except for price fluctuations, by re-calculating weighting factor, given stock’s weighting will be equalized to last session close weighting before this change. As a result, weighting of stocks in index is not affected from other factors (for example capital decrease/increase, merger/spin-off etc.) except for price and weighting theme.\n
The periodic review for determining the stocks to be included in the BIST Buyback Index has been completed in accordance with the BIST Market Cap Weighted Stock Indices Methodology.
It has been decided to make the changes listed in the below table for the period July 7, 2026 – August 6, 2026.
BIST BUYBACK INDEX
CHANGES FOR THE PERIOD JULY 7, 2026-AUGUST 6, 2026
Click for the Announcement.