US President Donald Trump recently announced a tariff hike of 25% on imports from Canada and Mexico (only 10% on Canadian energy products), and a 10% tariff hike on imports from China on top of the existing tariffs. Tao Wang, Chief China Economist at UBS Investment Bank, responded in a report that total US imports from these three countries are 45% of US total merchandise imports and 5% of US GDP.Related NewsInitial Jobless Claims for Feb/01 in United States is 219K, higher than the previous value of 208K. The forecast was 213K.UBS global team estimated that a 25% US tariff hike on Canada and Mexico would lower US GDP growth by about 0.8 ppts, assuming these tariffs are sustained for a period with little retaliation, limited absorption of costs by exporters, and importers pass through half of the higher costs.The broker did not adjust its 2025 baseline forecast of 4% GDP growth for China, which has an embedded assumption of the US imposing 60% tariff hike on one-quarter of China's exports in 3Q25, and on more goods in 2026. The 10% tariff hike came in quickly and lower, as there remains a lot of uncertainty on the timing and scale of additional tariffs on China, UBS added.Related NewsFactory Orders MoM for Dec in United States is -0.9%, lower than the previous value of -0.8%. The forecast was -0.7%.