The Istanbul Stock Exchange was negatively affected by the increasing tension in the Middle East. Concerns about the escalation of war brought selling pressure on risky assets. The BIST 100 index lost 1.55% in the first half of the day, dropping to 9,206 points. Losses in banking shares approached 4%. The BIST 100 index, which moved in a downward trend in the first half of the day, fell to 9,206.01 points by 13.00, down 145.21 points from the previous close. The total trading volume was 34 billion lira. The banking index lost 3.57%, while the holding index dropped by 2.06%. Among the sector indices, sports showed a gain of 0.57%, while banks experienced the most significant decline. Global markets followed a mixed trend due to escalating tensions in the Middle East. Today, investors are focusing on the ADP private sector employment data to be announced in the US. Uncertainties about the situation of conflicts in the Middle East and whether the fight against inflation globally will result in a recession continue to dampen risk appetite. Analysts pointed out that today, domestic companies outside the financial sector will be monitoring their foreign currency assets and liabilities, while in the US, data on ADP Private Sector Employment will also be watched, with support at 9,200 and 9,100 points and resistance at 9,400 and 9,500 levels in the BIST 100 index.