The BIST 100 index in Borsa Istanbul closed the week with an average loss of 0.74 percent. Last week, Margun Enerji shares performed the best, while CVK Maden ended as the biggest loser of the week. The BIST 100 index in Borsa Istanbul closed the week down 0.74 percent at 9,877.59 points. Throughout the week, the index saw a low of 9,756.73 and a high of 9,983.21 points. During the same period, the financial index in Borsa Istanbul increased by 0.29 percent to 11,609.31 points, the services index decreased by 0.28 percent to 10,024.99 points, the industrial index fell by 1.51 percent to 12,507.54 points, and the technology index dropped by 5.27 percent to 14,103.72 points. AMONG THE BIGGEST GAINERS Among the stocks included in the BIST 100 index in Borsa Istanbul, the top performer of the week was Margun Enerji with a 9.96 percent rise. Following Margun Enerji were Tekfen Holding with 9.44 percent and Fenerbahçe Futbol AŞ with 8.52 percent increase. BIGGEST LOSERS OF THE WEEK The biggest losers among these stocks were CVK Maden with an 11.25 percent drop, Astor Enerji with 10.68 percent, and Kontrolmatik Teknoloji with 9.17 percent decrease. The most valuable companies with shares traded in Borsa Istanbul were Garanti BBVA with 541.8 billion liras, Turkish Airlines with 437.115 billion liras, and Koç Holding with 405.236 billion liras.