A hidden risk appears to be building up in the markets. No one knows exactly what it means市场中似乎正在酝酿一种隐患。没有人确切知道这意味着什么。
If you look only at the obvious numbers, you wouldn’t ever see it.

Charly Triballeau/AFP/Getty Images
If you look only at the obvious numbers, you wouldn’t ever see it.
But an estimate of potential risk that’s hidden to all but the most attentive investors and economists has been building up in the bond market for months. It’s called the term premium, and it just hit a 12-year high.
No one knows precisely why the wonky metric seems to be saying it’s riskier now to invest for the long haul than it was during the inflation crisis, the global trade war or the pandemic. But it’s got one corner of investors sweating.
It could be nothing but noise. It could reflect nervous energy among investors. Or it could signal that the bond market is pricing in even more economic danger than people realize.
Here’s what’s going on. (And don’t worry, we’ll hold your hand through some seriously nerdy stuff.)
If you’re an investor who wants to buy Treasuries over the course of the next 10 years, you have multiple options available to you. For example, you could buy a 10-year bond. Or you could buy a 5-year bond and roll it over halfway through the decade. Or you could buy a 2-year bond and roll your investment over five times. You get the picture.
In a perfect world, the cost of buying a long-term bond should be the same as rolling over short-term bonds in the same time period. A decade is a decade no matter how you slice it. The risk is the same.
But we don’t live in a perfect world; we live in a cloud of uncertainty.
Right now, investors have put a significant premium on buying 10-year Treasuries compared to short-term bonds that roll over multiple times throughout the next decade. The term premium estimates the value of that extra charge. According to two models , it hasn’t been this high since the spring of 2014.
Still confused? Think of it this way.
Let’s say you have a hungry kindergartner. You give her a candy bar and tell her: “I want you to wait 10 minutes before you eat this. I’ll be back to check on you.”
The likelihood that the kid is going to chow down is probably higher if you leave her alone for 10 whole minutes than if you check in on her every two minutes.
But the term premium can be negative, too, as it was throughout the pandemic and as recently as two years ago.
In that case, the kindergartner isn’t hungry – she’s spiteful. She’s more likely to eat the candy if you keep tabs on her every two minutes than trust her to hang on to it for 10 minutes. The near-term risk is higher than over the long haul.
Right now, the market appears to be telling us that the kindergartner is ravenous and investing for the next 10 years could come with some considerable risk.
Now, the even trickier part is understanding why the term premium is suddenly so high.
Certainly, there’s a ton of risk in the marketplace. Investors are uncertain about AI, ballooning debt, the Iran war, geopolitical uncertainty… but the past 12 years were pretty bananas, too: Is it really less safe to invest over the next decade than at any point since 2014?
Market analysts and economists note the term premium is poorly understood and subject to interpretation.
Among the possibilities:
It’s riskier to invest now: The simplest interpretation is that long-term investing really is riskier now than in the past.
AI spending is measured in the trillions of dollars, and the rapidly developing technology is reshaping the economy in ways that are difficult to predict or understand.
The International Monetary Fund on Tuesday said rising government debt across the world is becoming unsustainable. Populist economic policies have found favor on the left and the right, and neither spending reductions nor higher taxes have much support among most major economies.
The Iran war has reignited worldwide inflation without a clear endgame, and President Donald Trump left open the possibility of resuming US attacks on Iran after the midterms. Central banks around the world would probably respond to even higher fuel prices by raising interest rates.
All those factors are sending bond yields to multi-decade highs, raising the cost of borrowing and threatening to slow economic growth. But inflation from AI and fuel shortages may not slow down even if the economy cools off, potentially complicating the government’s ability to intervene with emergency action if necessary.
Li Rui/Xinhua/Getty Images
And one unpredictable dynamic that could throw a wrench in the economy’s gears: shifting geopolitics. France may elect its first far-right president since World War II. The UK’s welfare state is crumbling. The Middle East is a powder keg. China and the United States are engaged in a high-stakes battle for AI supremacy. And US midterms could yield unpredictable results in November.
“It’s important that economists like myself and other capital markets professionals remain humble about our own Achilles heel: its geopolitics,” said Joe Brusuelas, chief economist at RSM US. “We get it mostly wrong, our models and metrics rarely capture those dynamics and are often behind the curve when things get kinetic.”
Investors think it’s riskier to invest now: But the term premium doesn’t necessarily measure actual risk. It could measure the perception of risk for investors.
“Don’t infer because there’s a higher risk premium, there’s higher risk,” said Thierry Wizman, economist at Macquarie Group. “It could just be that people are more averse to risk.”
Like a gambler riding a hot streak, investors staring at record-high stock prices and a fast-growing economy may become nervous that their luck is about to run out.
Economic conditions haven’t really changed all that much recently: Unsustainable debt loads have been a problem for decades. AI growth has been on a massive upward trajectory for years. Inflation has been above the Federal Reserve’s 2% target for five years.
But something may be rattling investors, and they’re looking for insurance to park their money over the long haul.
“Prices look calm, but people are quietly buying insurance everywhere,” said Nigel Green, CEO of DeVere Group. “Typically, when everyone’s nervous but prices haven’t moved, things don’t adjust gently if the bad news comes; they lurch.”
The model is wrong: It’s also possible that the model isn’t saying what we think it is.
The recent rise in the term premium may have nothing to do with Iran, AI or debt at all. It could be explained by technical factors. For example, large funds may have been rebalancing their portfolios at the end of the third quarter.
“Because the term premium represents the component of a bond yield that cannot be explained by the expected path of short-term interest rates, it is difficult to identify precisely what drives it,” noted Neil Shearing, economist at Capital Economics.
So the best we can do is guess – and proceed with caution.
Charly Triballeau/AFP/Getty Images
如果只看显而易见的数字,你永远不会发现这一点。
但除了最敏锐的投资者和经济学家之外,几乎无人察觉的潜在风险,已经在债券市场积聚了数月之久。这种风险被称为期限溢价,而它刚刚创下了12年来的新高。
没人确切知道为什么这个不太靠谱的指标似乎表明,现在进行长期投资的风险比通胀危机、全球贸易战或疫情期间更高。但这确实让一部分投资者感到担忧。
这可能只是市场噪音,也可能反映出投资者的紧张情绪,或者预示着债券市场对经济风险的定价可能比人们意识到的还要高。
事情是这样的。(别担心,我们会手把手地教你搞懂一些非常专业的东西。)
如果你是一位想在未来十年内购买国债的投资者,你有多种选择。例如,你可以购买10年期国债。或者你可以购买5年期国债,并在十年中期进行展期。或者你可以购买2年期国债,并将你的投资展期五次。你应该明白我的意思了。
理想情况下,购买长期债券的成本应该与同期展期短期债券的成本相同。十年就是十年,无论如何计算,风险都是一样的。
但我们生活在一个并不完美的世界里;我们生活在充满不确定性的阴云之中。
目前,投资者对购买10年期美国国债的溢价远高于未来十年内可多次展期的短期债券。期限溢价正是对这部分额外费用的估算。根据两个模型显示,期限溢价已达到2014年春季以来的最高水平。
还是不明白?不妨这样想。
假设你有一个饿了的幼儿园小朋友。你给她一块巧克力,然后告诉她:“请你等10分钟再吃。我一会儿会回来看看你。”
如果你让孩子独自待上 10 分钟,她吃东西的可能性可能比你每两分钟去看她一次要高。
但期限溢价也可能为负值,就像疫情期间以及两年前那样。
在这种情况下,这个幼儿园小朋友不是饿了,而是故意捣蛋。与其指望她能把糖留着10分钟,不如每隔两分钟就盯着她看,这样她更有可能把糖吃掉。短期风险比长期风险更高。
目前,市场似乎在告诉我们,这只幼儿园小朋友正处于贪婪状态,未来 10 年的投资可能会带来相当大的风险。
现在,更棘手的部分是理解为什么定期寿险保费突然变得如此之高。
当然,市场风险巨大。投资者对人工智能、不断膨胀的债务、伊朗战争、地缘政治不确定性感到担忧……但过去12年也相当动荡:未来十年的投资真的比2014年以来的任何时候都更不安全吗?
市场分析师和经济学家指出,“溢价”一词的含义不明确,容易产生歧义。
其中一种可能性是:
现在投资风险更大:最简单的解释是,长期投资现在的风险确实比过去更大。
人工智能领域的支出以万亿美元计,这项快速发展的技术正在以难以预测或理解的方式重塑经济。
国际货币基金组织周二表示,全球政府债务不断攀升已变得难以为继。民粹主义经济政策在左翼和右翼都颇受欢迎,而削减开支或提高税收在大多数主要经济体中都缺乏支持。
伊朗战争再次引发全球通胀,且看不到尽头。唐纳德·特朗普总统并未排除中期选举后美国恢复对伊朗军事行动的可能性。世界各国央行可能会通过提高利率来应对更高的燃油价格。
所有这些因素都导致债券收益率升至数十年来的最高水平,推高了借贷成本,并有可能减缓经济增长。但即使经济降温,人工智能引发的通胀和燃料短缺也可能不会缓解,这可能会使政府在必要时采取紧急措施的能力变得复杂。
李睿/新华社/盖蒂图片社
还有一个难以预测的因素可能会给经济运行带来阻碍:地缘政治格局的变化。法国可能会选出二战以来首位极右翼总统。英国的福利制度正在瓦解。中东局势一触即发。中美两国正在为争夺人工智能霸权展开一场高风险的较量。而11月的美国中期选举结果也可能难以预料。
RSM美国首席经济学家乔·布鲁苏拉斯表示:“像我这样的经济学家以及其他资本市场专业人士,必须对我们自身的软肋——地缘政治——保持谦逊。我们大多时候都判断失误,我们的模型和指标很少能捕捉到这些动态,而且在局势变得紧张时,我们往往反应迟钝。”
投资者认为现在投资风险更大:但期限溢价并不一定能衡量实际风险,它可能反映的是投资者对风险的感知。
麦格理集团经济学家蒂埃里·维兹曼表示:“不要因为风险溢价高就断定风险也高。这可能仅仅是因为人们更厌恶风险。”
就像赌徒手气正旺一样,投资者盯着创纪录的股价和快速增长的经济,可能会担心好运即将用完。
近期经济形势并未发生太大变化:不可持续的债务负担已持续数十年;人工智能发展多年来一直保持高速增长;通胀率已连续五年高于美联储2%的目标。
但某些因素可能令投资者感到不安,他们正在寻找保险措施来长期存放资金。
“价格表面平静,但人们都在悄悄地购买保险,”德维尔集团首席执行官奈杰尔·格林表示。“通常情况下,当大家都很紧张但价格没有变动时,一旦坏消息传来,价格调整不会是平缓的,而是会剧烈波动。”
模型有误:模型可能并没有表达我们所认为的意思。
近期定期寿险溢价的上涨可能与伊朗、人工智能或债务问题毫无关系,而可能由技术因素造成。例如,大型基金可能在第三季度末对其投资组合进行了再平衡。
“由于期限溢价代表了债券收益率中无法用短期利率预期路径来解释的部分,因此很难准确确定是什么因素驱动了它,”凯投宏观(Capital Economics)的经济学家尼尔·谢林(Neil Shearing)指出。
所以我们只能猜测——并谨慎行事。