西卡公司首席执行官：美国建筑行业乐观情绪受到特朗普贸易不确定性影响。

Group 1 - The CEO of Sika stated that the optimism in the U.S. construction industry is being affected by trade uncertainties related to Trump [1] - The construction sector is experiencing mixed sentiments due to ongoing trade discussions and potential tariffs [1] - Sika's performance may be influenced by these external factors, impacting their market outlook [1] Group 2 - The overall sentiment in the construction industry remains cautious amid the trade policy changes [1] - Companies in the construction sector are closely monitoring developments in trade negotiations [1] - The uncertainty surrounding tariffs could lead to fluctuations in material costs and project timelines [1]