While the BIST 100 index in Borsa Istanbul brought 25.4 percent to its investors in the first half of the year, all 4 main sector indices and 21 out of 23 sub-sector indices increased.
According to the compiled data, BIST 100 index, which completed last year at 11,261.52 points, saw the lowest point of 11,296.52 and the highest point of 15,204.92 points in the first 6 months of the year. The index reached 14,121.83 points as of June 30 closing, providing its investors with a 25.4 percent return in 6 months.
In the same period, BIST 30 index gained 33.7 percent in value and rose to 16,339.52 points. Thus, both indicator indices completed the first half of the year with an increase.
The value of BIST 100 in dollar terms increased by 15.4 percent compared to the end of last year, reaching 302.7 as of June 30. The index reached its lowest dollar-based level of 267.6 on January 2, and its highest level of 334.6 on May 11.
However, all 4 main sector indices gained value. While the technology index provided the highest return with 60.5 percent, it was followed by the financial index with 28.4 percent, the industrial index with 26.3 percent and the services index with 19.4 percent.
Looking at the sub-sectors, 21 out of 23 indices made gains, while 2 indices lost.
During this period, the financial leasing factoring index provided the highest return to its investors with 411.9 percent. This index was followed by informatics with 91.8 percent, main metal industry with 52.2 percent, food and beverage with 33.5 percent and metal goods machinery with 32.7 percent.
The holding and investment index, which is one of the sub-sector indices closely followed in the markets, gained 8.9 percent in the first half of the year, and the banking index gained 8.6 percent.
On the other hand, among the two sub-sector indices that caused losses to investors in the same period, textile leather and sports index decreased by 14.4 percent and 11.6 percent, respectively.
DEVELOPMENTS THAT GUIDE THE MARKETS
The direction of pricing in Borsa Istanbul in the first half of 2026 was shaped by the monetary policy of the Central Bank of the Republic of Turkey (CBRT), disinflation expectations, developments in the Middle East, foreign investor transactions and news flow regarding companies.
The BIST 100 index, which made a strong start to the year, tested record levels with the CBRT’s 100 basis point reduction in the policy rate to 37 percent in January, the decline in the country risk premium (CDS) and the expectations that interest rate cuts will continue. The bank left the policy rate constant in the March, April and June meetings.
On the other hand, Türkiye’s 5-year CDS, which rose to 327 basis points in March when the conflicts between the USA, Israel and Iran intensified, fell to 217 basis points due to the expectations that a peaceful environment would be established in the Middle East and the decline in bond interest rates, reaching its lowest level since February 26.
The CBRT’s announcement that preliminary data indicated that the decline in the underlying trend of inflation continued in June kept interest rate cut expectations for the second half of the year alive. The dismissal of the criminal case against Halkbank in the USA reduced the perception of legal risk on the banking sector.
