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United States 19 days ago ·

The Price of American Duration

The US 30-year Treasury touches 5.5%: this is not a market crisis, but the search for a new clearing price for duration. What the Treasury's buybacks and the return of the term premium are really telling us.

Fabrizio Ravetto26 September 2026 · 8 min read
FS
DOMINA MARKET INTELLIGENCE
26 SEPTEMBER 2026
DOMINA MARKET INTELLIGENCE · FIXED INCOME

Buybacks, term premium and the new clearing price of long-dated US debt

US Treasury Duration Term Premium Buyback

The 30-year US Treasury has moved into the 5.5% area in recent sessions, reaching levels not seen in over twenty years. It is a significant move, but I believe that focusing exclusively on the yield level achieved risks missing the more interesting part of what is happening in the US bond market.

In recent weeks, the Department of the Treasury has increased the size of buyback operations in the longer segments of the curve. For nominal securities in the 10–20 and 20–30 year buckets, the cap on liquidity support operations has been raised from the previous $2 billion to at least $4 billion per operation. Despite this intervention, the market has continued to sell duration.

At first glance this may appear contradictory: the Treasury increases purchases of its own securities and yields continue to rise. In reality, I believe the two can comfortably coexist, as they address different problems.

What buybacks can actually do

I would start precisely here, because some confusion is building around this topic. The Treasury programme is not a new round of quantitative easing and is not, at least formally, an attempt to control the level of yields. Its stated objective is to improve market liquidity, particularly in the off-the-run segments, where inefficiencies and significant liquidity spreads can emerge.

From this perspective, buybacks can work perfectly well without pushing the 30-year yield lower. The Treasury can retire some of the less liquid outstanding issues from the market, improve microstructure and reduce certain imbalances, but what it cannot do — at least with operations of this size — is determine what yield should convince an investor to lock up capital for thirty years.

It is probably here that the crux of the matter lies, because the problem the market is currently pricing appears to be less and less a liquidity problem and increasingly a question of duration pricing.

The return of the term premium

For many years we interpreted the US curve primarily through the lens of inflation, growth and Federal Reserve expectations. That was a reasonable approach in a world characterised by contained inflation, quantitative easing and abundant global demand for risk-free assets. Today the backdrop is different.

Anyone buying a 30-year Treasury must consider not only where the Fed Funds rate will be in six or twelve months, but also what average inflation they will have to endure over the life of the investment, what trajectory US public debt will follow, how much new duration will need to be absorbed by the market, and what yield future investors will require. All of this feeds, in various forms, into what we call the term premium, and it is precisely this component that appears to me to be reasserting a central role in the determination of yields.

The point, therefore, is not that investors have stopped buying Treasuries. Auctions continue to attract demand and we are not, at least for now, facing a market that is unable to function. Investors continue to buy, but they are demanding greater compensation to do so, and this distinction seems to me fundamental to correctly interpreting what is taking place.

No buyers' strike in sight

To speak of a Treasury market crisis would, at this stage, be an overstatement. Were we facing a genuine buyers' strike, we would expect to observe far more evident problems in auctions, in liquidity and in the market's capacity to absorb issuance. That is not the picture that emerges.

What we are currently observing resembles more the search for a new clearing price for US duration. The market continues to finance the US government, but the conditions under which it is willing to do so are changing, and this also helps explain why buybacks have not prevented the thirty-year yield from continuing to rise.

The Treasury can intervene on the supply of securities available in certain segments and can improve market functioning, but the Treasury market is vastly larger than any individual buyback operation. A few billion dollars can be very significant for the marginal liquidity of a given segment; it is far less clear that it can durably alter the yield demanded by the entire market to hold thirty-year duration risk.

The macro backdrop is not helping

Adding further complexity to the picture is, naturally, oil. The renewed rise in energy prices has brought inflation back to centre stage precisely as the American economy continues to demonstrate a degree of resilience that many had not anticipated.

For the bond market, the combination is particularly unfavourable, as still-resilient growth, elevated energy costs, large fiscal deficits and a significant volume of new debt to be placed all act simultaneously on the price of duration.

To this I would add a less immediately visible factor that is nonetheless worth monitoring. In the United States, enormous private-sector demand for capital is simultaneously building, tied to artificial intelligence — from data centres to semiconductors, extending through energy infrastructure, electricity grids and computing capacity. The US government is therefore not the only entity that needs to raise financing, and public capital and private capital are competing, at least in part, for the same pool of savings. In a world where capital once again has a cost, this competition matters.

Why 5.5% matters even for those not buying Treasuries

The thirty-year yield is not solely a concern for the bond market, because a risk-free rate close to 5.5% progressively alters the benchmark against which all other assets are valued.

If I can earn a nominal return in excess of 5% by lending money to the US government, equities, credit, private equity, real estate and infrastructure must offer something more to compensate for the additional risk. It is a slow process, but a highly consequential one.

For more than a decade we lived in a financial system in which the risk-free rate was so low as to drive investors towards any asset capable of offering incremental yield. Today the mechanism may operate in reverse.

This does not automatically mean that risk assets must fall, but it does mean that their expected return must be benchmarked against an alternative that has suddenly become far more competitive. It is perhaps this, more than the nominal level reached by the thirty-year Treasury, that represents one of the most significant consequences of the move we are witnessing.

What I would be watching now

I would not focus too heavily on identifying the next technical level. After 5.30%, 5.40% and 5.50%, it would be easy to begin debating 6%, but it is possible we get there just as it is possible the move reverses. The genuinely interesting question, for me, lies elsewhere: I would want to see how the long end reacts when genuinely weaker macroeconomic data arrives.

If an economic slowdown, a weak payrolls print or better-than-expected inflation data were to bring the thirty-year yield swiftly back to lower levels, then a significant portion of the recent move could still be explained through the normal repricing of the monetary cycle.

If, on the other hand, even data favourable to duration were to produce only modest declines in yields, the reading would become different, because it would mean that a growing component of the thirty-year yield no longer depends simply on expectations regarding the Federal Reserve's next decision, but on something more structural: the premium demanded by the market to hold very long-dated US debt. That, in my view, would be the truly significant signal.

The price of time

I do not believe the market is calling into question the United States' nominal ability to repay its debt, as that would be a far stronger conclusion than the data currently support. The question the market is asking is much simpler: how much do I need to be paid to lend money to the United States for thirty years?

For a long time the answer was shaped by low inflation, quantitative easing, strong international demand for safe assets and an abundance of capital. Today, several of these conditions are changing simultaneously.

The Treasury can use buybacks to improve market functioning, the Federal Reserve can adjust short-term borrowing costs, and fiscal policy can, at least in theory, alter the future trajectory of deficits and debt. Ultimately, however, the price of duration must still meet investor demand.

For this reason I would avoid reading the rise in the thirty-year yield as proof that buybacks are not working. They may be working perfectly well with respect to the objective for which they were designed; it is simply possible that the market is discussing something else entirely — not Treasury liquidity, but the price of time.

FS
DOMINA Market Intelligence
Author · Fabrizio Ravetto

Informational and research document; does not constitute personalised recommendation, advice or investment solicitation.

Content produced with the support of artificial intelligence.

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