An aerial drone photo shows a trailer truck (lower left) transporting vehicles on a highway in Nogales, Sonora, Mexico, April 2, 2025. U.S. President Donald Trump on Wednesday signed an executive order on the so-called "reciprocal tariffs," imposing a 10-percent "minimum baseline tariff" and higher rates on certain trading partners. (Xinhua/Li Mengxin)The uncertainty from Washington constitutes a systemic risk, influencing corporate decision-making and dampening global investment activities, said an Uzbek expert.TASHKENT, April 19 (Xinhua) -- The erratic tariffs of the United States have become a key factor driving global economic turbulence, said an Uzbek scholar.The lack of continuity in U.S. trade policy, coupled with frequent shifts in objectives and approaches, has created an atmosphere of distrust, said Ravshan Nazarov, a senior researcher at the Institute of State and Law of Uzbekistan's Academy of Sciences, in an interview with Xinhua.He emphasized that the uncertainty from Washington constitutes a systemic risk, influencing corporate decision-making and dampening global investment activities.The vagueness surrounding U.S. policy goals has left many multinational companies unable to develop long-term strategies, forcing them to delay investment plans, which directly hinders the recovery of the global economy, he noted.The expert also highlighted the broader political environment that is contributing to a cascade of negative effects, including rising production costs, declining consumer confidence, market volatility and a deterioration in product quality.U.S. President Donald Trump shows an executive order on "reciprocal tariffs" at the Rose Garden of the White House in Washington, D.C., the United States, on April 2, 2025. Amid widespread opposition, U.S. President Donald Trump on Wednesday signed an executive order on the so-called "reciprocal tariffs," imposing a 10-percent "minimum baseline tariff" and higher rates on certain trading partners. (Xinhua/Hu Yousong)According to Nazarov, both the real economy and the financial system are facing dual pressures, which in turn exacerbate the vulnerabilities of global markets.On international trade, Nazarov expressed concern that the increasingly unilateral approach adopted by the United States is eroding the foundations of multilateral cooperation.He stressed that for international mechanisms to function effectively, stable, predictable and transparent policies are essential. Unfortunately, U.S. actions are damaging this system.History has repeatedly shown that there are no winners in trade wars. At a time when the global economy is on the threshold of a new phase of recovery, countries must embrace the principles of mutual benefit and fair cooperation, he said.Nazarov called on the world's leading economies to return to multilateral dialogue and abide by established rules to build a more stable, equitable and inclusive international economic order.