Borsa Istanbul concluded the week with a loss of 1.24 percent. The stock that gained the most value this week was Ereğli Iron Steel. Following Ereğli were Akbank and İş Bankası. The BIST 100 index in Borsa Istanbul completed the week with a 1.24 percent loss, closing at 9,777.46 points. Throughout the week, the index reached its lowest point at 9,696.01 and its highest at 10,108.15 points. During the same period, the Borsa Istanbul Financial Index gained 1.26 percent, reaching 11,425.56 points, the Services Index fell by 3.92 percent to 9,312.38 points, the Industrial Index decreased by 2.48 percent to 12,919.61 points, and the Technology Index experienced a 1.72 percent loss, ending at 12,729.62 points. Top Performers of the Week Among the stocks included in the BIST 100 index in Borsa Istanbul, Ereğli Iron Steel saw the highest increase, with 5.84 percent this week. Following Ereğli Iron Steel were Akbank with 5.65 percent and Türkiye İş Bankası (C) with 5.44 percent. Among these shares, the top decliners were BİM Birleşik Mağazalar with 12.63 percent, Batıçim Batı Anadolu Çimento with 11.56 percent, and Europen Endüstri with 10.75 percent. The most valuable companies with shares traded on Borsa Istanbul were Garanti BBVA with 516 billion 600 million lira, Koç Holding with 474 billion 720 million lira, and Türk Hava Yolları with 403 billion 305 million lira.