The BIST 100 index on Borsa Istanbul started the new day at 14,219.98 points, down 15.86 points, or 0.11%, from the previous close.
The index, which followed a predominantly negative trend on the previous day, ended the session down 1.60% at 14,235.83 points.
Sector indices at the opening
At the opening, the banking index gained 0.11%, while the holding companies index rose 0.06%.
Among the sector indices, forestry, paper and printing posted the largest increase, rising 0.41%. The information technology index recorded the sharpest decline, falling 2.22%.
Global markets follow a negative trend
Global markets are following a negative trend due to ongoing tensions in the Middle East, selling pressure in the bond market and uncertainty surrounding artificial intelligence companies.
Analysts said that domestic markets would monitor the budget balance, while international markets would focus on a busy data agenda led by the eurozone's foreign trade balance and the US New York Fed manufacturing index.
Technically, 14,100 and 14,000 points stand out as support levels for the BIST 100 index, while 14,400 and 14,500 points are seen as resistance levels.