Performance of Investment Instruments in the Week Ending June 26, 2026

Borsa Istanbul; Retreat of the Main Index (BIST 100) During the past week, the Turkish capital market witnessed widespread selling pressure. The Borsa Istanbul main index (BIST 100), experiencing high volatility, finally ended its activity at the level of 14,274.02 points with a 3.13 percent decrease compared to the previous week [1][3]. Throughout this week, the index fluctuated between a low of 14,147.05 and a high of 14,871.49. Despite a slight growth of 0.10 percent on the last trading day (Friday), the overall weekly return for shareholders remained negative [4]. Among various industries, the basic metals sector had the best performance with 2.84 percent growth, and the tourism sector had the weakest daily performance with a 1.73 percent decrease [5].

Gold and Currency Market; Dollar Takes the Lead Unlike the stock market, the foreign currency market saw slight growth. At the end of the week's trading, the US Dollar increased by 0.39 percent to reach a price of 46.6280 Lira [2]. The Euro also stabilized at the level of 53.3080 Lira with a very slight growth of 0.06 percent [3].

In contrast, gold investors had a difficult week. The price of 24-karat gold per gram in the Istanbul Grand Bazaar (Kapalıçarşı) fell by 1.63 percent to 6,097 Lira [1]. Also, the price of the Republic Gold coin traded at the level of 41,098 Lira with a 1.62 percent drop. This decrease in gold prices occurred under the influence of global market fluctuations and interest rate changes in major economies [2][5].

Investment Funds and Global Outlook A review of the performance of investment funds shows that most of these instruments faced a decline in value last week. Investment funds lost an average of 1.23 percent and pension funds lost 1.65 percent in value [3]. However, Money Market Funds (Para Piyasası Fonları) were the only profitable sector in this category with a return of 0.75 percent [1].

Globally, concerns about high technology and artificial intelligence costs, as well as geopolitical tensions in the Middle East, have affected investor risk appetite. Brent oil is trading in the range of 74 Dollars and Bitcoin has fallen below the 60,000 Dollar mark, indicating trader caution in high-risk markets [3][5].