美国国债突破40万亿美元 经济预警信号闪烁

美国国债本周突破40万亿美元大关，引发经济担忧。1这一数字正以每秒9万美元的速度增长，即每天增加78亿美元。1

债务规模的增速令人担忧。1美国国债与经济规模的比率已达126%，而且在过去十年内翻倍增长——2016年特朗普第一任期开始时国债仅略低于20万亿美元。1利息支付压力不断加重，当前利息支付额比去年同期上升15%，已接近税收收入的20%。1若按当前趋势，美国国债预计将在2036年前后攀升至约64万亿美元。1

经济学家对前景表示警惕。1长期利率已升至数十年来的高位。1经济学家穆罕默德·埃尔-埃里安警告称，"我们正在到达一个转折点，这是黄灯闪烁的阶段，还不是红灯"。1经济学家埃里克·斯旺森指出，投资者对向美国政府放贷的兴趣正在减弱。1投资者胃口的减退可能导致美国借贷成本上升，进而推高普通家庭的抵押贷款、汽车贷款和信用卡利率。1

The United States national debt has surpassed the $40 trillion mark, triggering widespread alarm about the country's fiscal trajectory and broader economic implications 1. The debt has doubled over the past decade, standing at just under $20 trillion when President Trump's first term began in 2016, and is now climbing at an alarming rate of approximately $90,000 every second, or $7.8 billion daily 1. The debt-to-GDP ratio now stands at 126 percent, with forecasts suggesting it could reach approximately $64 trillion by 2036 1.

The financial burden of servicing this debt has become increasingly acute. Interest payments on government borrowing have surged 15 percent compared with the same period last year and now consume nearly 20 percent of tax revenue 1. Long-term interest rates in the US have reached multi-decade highs, intensifying concerns about future borrowing costs 1. Economists have begun sounding the alarm about waning investor confidence in US government securities. Mohamed A El-Erian characterized the situation as "a flashing yellow light," suggesting the economy is approaching a critical juncture 1. Eric Swanson warned that investor appetite for lending money to the US government is "diminishing," a development that could force the government to offer higher interest rates to attract lenders 1. Such increases in borrowing costs would likely ripple through the broader economy, driving up mortgage rates, auto loans, and credit card charges for ordinary households.