Group 1 - The announcement of a 25% tariff on imported heavy trucks by the U.S. has led to a decline in stock prices for Daimler and Traton, with Daimler's shares dropping over 3% and Traton's shares falling over 2% [1] - Volvo's stock price increased by 3% as it has a lower dependency on Mexican manufacturing compared to its competitors [1] - The new tariff exacerbates existing trade barriers in the transportation industry, following a previous 15% tariff on EU-imported cars that has already pressured companies like Porsche and Audi [2] Group 2 - Traton's delivery and order volumes had already significantly declined due to uncertainties surrounding U.S. tariff policies, leading to reduced shifts at its Mexican plant [2] - Volvo stated that 60% to 70% of its U.S. truck production is localized, but it still imports some non-U.S. manufactured parts [2] - Volvo emphasized the need for actual legislative proposals to fully assess the potential impact of the tariff announcement [2]