The Istanbul Stock Exchange closed the week at 9,952 points, marking a 0.53% decrease. The biggest gain was seen in Işıklar Enerji shares with a 12% increase. On the other hand, Fenerbahçe shares experienced the most significant loss. The BIST 100 index finished the week at 9,951.65 points, losing 0.53% of its value. Throughout the week, the index ranged from a low of 9,619.83 to a high of 9,962.68 points. Meanwhile, the BIST financial index decreased by 1.64% to 11,575.28 points, the services index gained 0.28% to 10,053.49 points, the industrial index rose by 0.43% to 12,699.94 points, and the technology index fell by 2.25% to 14,887.65 points. Among the shares listed in the BIST 100 index, Işıklar Enerji Yapı Holding saw the most significant increase this week by 12.07%. Following Işıklar Enerji Yapı Holding, Oyak Çimento gained 5.94% and Batısöke Çimento Sanayi gained 5.80%. The shares that experienced the most significant losses were Fenerbahçe Futbol AŞ with an 11.01% decrease, Alfa Solar Enerji with a 9.54% decrease, and Smart Güneş Enerjisi with a 7.79% decrease. The most valuable companies with shares traded on the Istanbul Stock Exchange were Garanti BBVA with 540 billion 120 million lira, Turkish Airlines with 444 billion 705 million lira, and Koç Holding with 419 billion 437 million lira.