The BIST 100 index ended Wednesday at 12,118.29 points, down 132.39 points, or 1.08%, from the previous close. Total trading volume on the index amounted to 86.1 billion liras.
The banking index fell 1.35%, while the holding companies index declined 1.66%. Among sector indices, insurance was the top gainer, rising 0.65%, while financial leasing and factoring recorded the steepest decline, dropping 6.08%.
Inflation weighs on global markets
Consumer inflation in the United States rose 3.7% year-on-year in September. The inflation data exceeding expectations strengthened projections that the Federal Reserve could raise interest rates and limited risk appetite in global markets.

Domestic developments under watch
Developments concerning the fund matter were monitored domestically. Treasury and Finance Minister Mehmet Şimşek authorized an investigation into İbrahim Ömer Gönül, the former chair of the Capital Markets Board, based on the preliminary review report prepared by the Ministry's Board of Inspection.

Data and technical levels to watch
Domestically, the Central Bank of the Republic of Türkiye's weekly monetary and banking statistics will be monitored tomorrow. Internationally, Japan's August industrial production, the United Kingdom's August gross domestic product, industrial production and foreign trade balance, and the eurozone's August industrial production will be followed.
In the United States, September retail sales, the New York Fed's October manufacturing index, weekly jobless claims, and the September Producer Price Index and core Producer Price Index will be released.
Technically, 12,100 and 12,000 points stand out as support levels for the BIST 100 index, while 12,300 and 12,400 points are seen as resistance levels.