BIST 100 index in Borsa Istanbul started the day with a 0.09% decline at 9,901.91 points. At the opening, the BIST 100 index decreased by 9.16 points and 0.09% compared to the previous close, reaching 9,901.91 points. While the banking index moved sideways, the holding index lost 0.42% in value. Among sector indices, trade gained the most with 0.56%, while tourism lost the most with 0.93%. In the domestic market, the BIST 100 index closed yesterday with a 2.61% gain at 9,911.07 points after following a buying trend. Globally, the increase in risk perception was observed due to the US starting to impose tariffs on Canada and Mexico, as well as increasing tariffs on China, which shifted the focus of investors to the responses these countries will give to the US. The US announced that as of today, an additional 10% tariff will be imposed on goods imported from Canada and Mexico, while the 10% tariff on goods imported from China will also be increased by an additional 10%. In addition, Borsa Istanbul stated that the uptick rule in short selling transactions for shares included in the BIST 50 index will continue today. Analysts expressed that today, domestically the real effective exchange rate and the foreign exchange assets and liabilities of firms outside the financial sector, as well as the unemployment rate in the Eurozone internationally, will be monitored. It is noted from a technical perspective that the levels of 10,000 and 10,100 are seen as resistance, while 9,800 and 9,700 points are considered support for the BIST 100 index.