美国国债连续第五天下跌，在本周将进行多场国债招标之际，市场对长债需求减弱。

7月8日美国国债全线下滑，推动收益率上升2至4个基点，30年期收益率自5月以来首次接近5%。

收益率此前就在一路攀升，因非农就业报告显示美国劳动力市场意外坚韧，投资者下调对美联储降息的押注。利率掉期显示，交易员预计年底前将有两次幅度25基点的降息，第一次将在9月份到来。

AmeriVet Securities美国利率交易与策略主管Gregory Faranello表示：“从就业数据发布到长期债券供应，市场通常会出现盘整。我们对收益率下行的看法不变，仍然认为只有经济因素和美联储才能推动收益率下跌。”

7月8日早些时候，日本长期国债抛售引发全球市场新一轮下跌，德国国债收益率上扬。

长期债券面临压力，尽管供应增加，传统买家纷纷退出市场。由于利率风险较高，这类债券吸引的投资者较少，且流动性低迷往往会放大价格波动。

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