国际货币基金组织：尽管波动性较大，美国国债市场仍然保持有序。

Group 1 - The core viewpoint of the article is that despite significant volatility, the U.S. Treasury market remains orderly according to the International Monetary Fund [1] Group 2 - The U.S. Treasury market has shown resilience amidst fluctuations, indicating a stable environment for investors [1] - The IMF's assessment highlights the importance of the U.S. Treasury market in the global financial system [1] - The orderly nature of the market suggests confidence among investors, which is crucial for maintaining liquidity and stability [1]