“FEVER” WAS how Scott Bessent(美国财政部长，前对冲基金高管), America’s treasury secretary, described the spike(飙升；尖峰) in US government-bond yields as he sought to justify a controversial intervention to help the market return to normal. He also promised more dramatic intervention should the delirium(神志不清；谵妄) persist. Yet the more appropriate metaphor for what has been happening to the bond markets comes from forestry: the markets are attempting a controlled burn to make room for new and more promising drivers of economic growth.(然而，更贴切的比喻来自林业：市场正在尝试计划烧除，为新的、更有前景的增长引擎腾出空间。) And Mr Bessent’s intervention risks whipping up a blaze that could cause damage well beyond America.
美国财政部长斯科特·贝森特在为一项颇具争议的干预措施辩护、声称要帮助市场恢复正常时，将美国国债收益率的飙升形容为“发烧”。他还承诺，如果这种“神志不清”的状态持续下去，将采取更大力度的干预。然而，用林业术语来比喻债券市场正在发生的事或许更为贴切：市场正在尝试“计划烧除”，为新的、更有前景的经济增长引擎腾出空间。而贝森特的干预，恐怕会煽起一场大火，其危害远不止于美国。
In the past fortnight(两周) or so, the yield on America’s ten-year government bond rose from under 4.7% to almost 5%, where it hover(徘徊；盘旋)ed until, on September 14th, it briefly crossed that level—once seen by market-watchers as extremely unlikely—for the first time since 2023. The move in the 30-year has been even larger, pushing that yield above 5.35%, at a time when budgetary interest payments have risen sharply and now consume around a fifth of tax revenue. America is funding its budget deficit at borrowing costs not seen in two decades or so, while refinancing maturing bonds issued at much lower rates in a debt stock that has doubled to $40trn in just ten years.(美国正以约二十年来未见的借贷成本为预算赤字融资，同时还要为那些以低得多的利率发行、即将到期的债券再融资，而债务存量在短短十年内已翻倍至40万亿美元。)
在过去两周左右的时间里，美国十年期国债收益率从不到4.7%升至近5%，并在此水平徘徊，直到9月14日首次短暂突破5%——这一水平曾被市场观察人士视为极不可能出现——为2023年以来首次。三十年期国债的变动幅度更大，收益率突破5.35%，而与此同时，预算利息支出已大幅上升，如今消耗了约五分之一的税收收入。美国正以约二十年来未见的借贷成本为预算赤字融资，同时还要为那些以低得多的利率发行、即将到期的债券再融资，而美国债务存量在短短十年内已翻倍至40万亿美元。
The effects are being felt beyond the budget, including in politically sensitive areas such as mortgages, where the average 30-year rate is now over 7%. This aggravate(加剧；使恶化)s the top issue on voters’ minds ahead of the midterm elections(美国中期选举): affordability(负担能力；可负担性). It also raises corporate borrowing costs and risks diverting capital away from a stock market that has been rewarding investors with a series of record highs this year.
其影响已超出预算范畴，波及按揭贷款等政治敏感领域——目前30年期按揭平均利率已超过7%。这加剧了中期选举前选民最关心的问题：负担能力。它还推高了企业借贷成本，并可能使资本从今年屡创新高的股市中分流。