The BIST 100 index in Borsa Istanbul closed the day at 8,898.23 points, down 1.27 percent. Compared to the previous close, the index showed a decrease of 114.64 points, with a trading volume of 82.7 billion Turkish lira. While the banking index fell by 2.86 percent and the holding index by 1.24 percent, the insurance sector emerged as the top gainer with a 2.43 percent increase. On the other hand, the mining sector stood out as the sector with the largest decline, losing 7.30 percent. Optimism increased with economic recovery signals in the United States, but tensions in the Middle East are dampening risk appetite. According to data released today in Turkey, the Consumer Price Index (CPI) rose by 2.97 percent month-on-month and 49.38 percent year-on-year in September. Analysts noted that reports on real effective exchange rates and price developments in Turkey, as well as employment data in the United States, will be closely monitored tomorrow, with a focus on how the non-farm payroll data could shed light on Federal Reserve policies. From a technical standpoint, the resistance levels for the BIST 100 index are seen at 9,150 and 9,300, while support levels are at 8,700 and 8,600.