花旗集团和富国银行加入美国发行人发售欧元债券的热潮，“对美元损失的担忧”发挥了关键作用。

Group 1 - Citigroup and Wells Fargo have joined the trend of U.S. issuers selling euro-denominated bonds, driven by concerns over losses in U.S. dollars [1] - The issuance of euro bonds reflects a strategic response to currency fluctuations and market conditions [1] - This trend indicates a growing interest among U.S. companies to diversify their funding sources and mitigate currency risk [1]