The
following is my answer to a Quora question: “How
long can the market absorb a 10-year Treasury yield above 5%?”
The
question asks how long the market can absorb a 10-year Treasury yield above 5
per cent. The market is absorbing it
right now. The market has been absorbing
it since October 2023, when the 10-year yield first breached 5 per cent for the
first time since 2007. Auctions continue
to clear. Foreign central banks continue
to bid. Primary dealers continue to
absorb what the market does not.
The
market is not the problem. The market is
the messenger. The question should be:
how long can the US economy tolerate the conditions that a 5 per cent 10-year
yield creates? That is a different
question with a less comfortable answer for Americans.
What
a 5 Per Cent 10-Year Yield Does
The
10-year Treasury yield is not merely a government borrowing cost. It is the reference rate for the US
economy. Mortgage rates, corporate
borrowing costs, student loan rates, auto loan rates, and the discount rates
used to value every financial asset in the country are priced off it.
The
30-year fixed mortgage rate tracks 170 to 200 basis points above the 10-year
Treasury yield. At a 10-year yield above
5 per cent, the 30-year mortgage rate is 6.7 to 7 per cent. The National Association of Realtors reported
in 2023 that housing affordability reached its worst level since 1984 at these
rates. A median-priced US home at a 7
per cent mortgage rate requires 43 per cent of the median household income to
service — well above the conventional 28 per cent threshold for housing
affordability.
Housing
construction has contracted. Existing
home sales collapsed to their lowest level in three decades in late 2023
because homeowners with 3 per cent mortgages from 2020 and 2021 declined to
sell and take on new mortgages at 7 per cent. The housing market did not crash. It froze.
A frozen housing market is economically damaging in a different way — it
prevents the labour mobility and capital reallocation that a functioning
housing market provides.
Corporate
borrowing costs have risen commensurately.
Investment-grade corporate bond yields moved from 2.5 per cent in 2021
to 5.5 to 6 per cent in 2023 and beyond.
High-yield corporate debt — the funding source for private equity
portfolio companies, leveraged buyouts, and growth-stage businesses — moved
from 4.5 per cent to 8.5 to 9 per cent.
The
companies that borrowed at 2021 rates face refinancing at 2024 and 2025
rates. The Leveraged Commentary and Data
database estimated that US$1.8 trillion in leveraged loans and high-yield bonds
required refinancing between 2023 and 2026. Each refinancing at current rates increases
the debt service burden on companies whose revenue growth has not kept pace
with the rate increase. Some will
manage. Some will not.
The
Federal Debt Service Problem
The
most acute consequence of sustained 5 per cent 10-year yields is the US
government’s own debt service cost — which has now overtaken defence spending
to become the third-largest line item in the federal budget, behind only Social
Security and Medicare. Net interest
payments rose 8 per cent to US$1.05 trillion in fiscal year 2026. Gross interest costs reached US$1.36 trillion
at an average interest rate of 3.53 per cent — more than double the average
rate in 2021. US$10 trillion in publicly
held debt matures within the next twelve months and must be rolled over at
current market rates.
The
arithmetic is straightforward and unpleasant.
The existing US$36 trillion in gross debt, rolled over progressively at
5 per cent rather than the blended 3.53 per cent currently on the books,
increases annual interest expense by US$530 billion. The Committee for a Responsible Federal
Budget estimated that if yields remain one percentage point above CBO
projections, interest costs reach US$2.8 trillion — 5.9 per cent of GDP — by
the end of the decade.
US$2.8
trillion in annual interest expense on a tax base of US$5.4 trillion means more
than half of federal revenue is consumed by debt service before a single dollar
is spent on defence, healthcare, social security, infrastructure, or any other
government function. This is not a
theoretical risk. It is the trajectory
of current policy at current rates.
Congressional
Budget Office Director Phillip Lee Swagel confirmed in October 2026 that
stabilising the debt-to-GDP ratio at current yield levels requires real GDP
growth of 5 to 6 per cent. Current real
GDP growth is 2.2 per cent. The gap
between what is required and what is occurring is not closable through growth
alone.
The
Pension and Insurance Sector
A
5 per cent 10-year yield has one beneficiary in the private sector: defined
benefit pension funds and insurance companies, whose liability valuations
decline as discount rates rise. The
funded status of US corporate pension plans improved significantly as rates
rose from 2022 onward — moving from 87 per cent funded on average in 2021 to 103
per cent funded by late 2023. It is also
a one-time adjustment, not a permanent structural gain. Once pension funds have matched their
liability duration with assets at current yields, the benefit of further rate
increases is marginal. The ongoing cost
to the rest of the economy — mortgage markets, corporate borrowing, federal
debt service — is not one-time. It
compounds.
The
public pension sector faces a different problem. State and local government pension funds in
the United States have aggregate unfunded liabilities estimated at US$1.3
trillion under governmental accounting standards and significantly more under
market-rate discount assumptions. These
funds were assuming 7 to 7.5 per cent returns in their actuarial models. Higher Treasury yields help on the liability
side but pressure the equity valuations that drive the asset side.
The
International Dimension
A
sustained 5 per cent 10-year Treasury yield changes the global capital flow
picture in ways that compound the domestic pressure. Emerging market economies — which borrowed
heavily in dollars during the 2020 and 2021 low-rate period — face
dollar-denominated debt service obligations that increase in local currency
terms as the dollar strengthens on the back of high US rates. The IMF’s 2026 World Economic Outlook
identified 60 per cent of low-income countries as in debt distress or at high
risk of it. This is partly a consequence
of dollar strength driven by US rate policy.
The
carry trade unwind — investors who borrowed in low-rate currencies to invest in
higher-yielding assets — creates periodic volatility episodes as the rate
differential shifts. Japan’s rate
normalisation, occurring simultaneously with sustained US yields above 5 per
cent, compresses the yen-dollar carry trade that has funded a significant
portion of global risk asset purchases for the past decade. More fundamentally, sustained high US rates
attract capital flows into dollar assets — which appreciates the dollar,
reduces US export competitiveness, and widens the current account deficit that
already stands at US$800 billion to US$1 trillion annually. The trade deficits that have been a source of
political friction domestically and internationally are structurally widened by
the rate policy required to manage inflation.
The
Long-Term Strategic Implications
The
strategic implications of sustained 5 per cent 10-year yields, unaddressed, are
not abstract. The first is the
progressive crowding out of productive federal investment. Defence spending, infrastructure investment,
research and development, and education — all compete with debt service for a
share of federal revenue. As debt
service consumes an increasing share of revenue, discretionary spending
contracts. The federal government’s
capacity to invest in the conditions of long-term economic competitiveness —
the scientific research that produced the internet, the GPS, the COVID-19
vaccine development infrastructure — shrinks in direct proportion to the
expansion of debt service.
The
second is the structural constraint on monetary policy. A Federal Reserve that attempts to lower
rates to stimulate a slowing economy faces pressure from bond markets that
demand higher rates to absorb the Treasury issuance required to finance the deficit. The Federal Reserve’s independence becomes
nominally intact but practically constrained — it can lower the Federal Funds
Rate, but if the bond market reprices 10-year yields upward in response to
fiscal deterioration concerns, the rate cut’s economic stimulus effect is
offset or eliminated.
The
third is the progressive erosion of dollar reserve currency status. Central banks globally have reduced the
dollar’s share of foreign exchange reserves from 71 per cent in 1999 to 56 per
cent today. The weaponisation of dollar
assets against Russia in 2022 accelerated this diversification. Sustained fiscal deterioration — visible in a
debt service cost that exceeds defence spending — provides additional
motivation for reserve diversification.
Gold overtook US Treasuries in total central bank reserve holdings in
early 2026. The trend is structural.
The
fourth — and most consequential in the long run — is the intergenerational
transfer of obligation. The debt that
produces the US$1.05 trillion in annual interest expense was mostly accumulated
in decisions made by elected governments between 2000 and 2025. The service cost falls on taxpayers for
decades. The infrastructure, education,
and research investment foregone in favour of debt service reduces the
productive capacity of an economy that the next generation will inherit.
The
Truth
The
market will absorb 5 per cent 10-year Treasury yields for as long as there is
no credible alternative to US Treasuries as the world’s primary safe-haven
asset. That condition currently
holds. It is not permanent. The reserve currency privilege that allows
the United States to borrow at rates lower than its fiscal position would
otherwise warrant — the “exorbitant privilege” that French Finance Minister
ValĂ©ry Giscard d’Estaing described in 1965 — depends on the rest of the world’s
confidence in US institutional stability and fiscal sustainability. That confidence is not unlimited. It is not unconditional. And it has never been tested by the
combination of a US$36 trillion debt, a US$2 trillion annual deficit, US$1.05
trillion in annual interest expense, and a political system that has
demonstrated consistent inability to address any of the three.
The
market can absorb 5 per cent yields indefinitely. The US economy cannot absorb their
consequences indefinitely. The question
is not whether the breaking point exists — it is where it sits and how much
runway remains before the distance to it becomes visible to the people
currently pretending it does not.
Terence
Nunis | Executive Chairman, Equinox Zenith | Author, The 1% Playbook: The
Billionaire Cheat Code





