Treasury Buybacks, a 4.9% Ten-Year and Bitcoin’s Record Week: What Business Owners Should Take From September 2026

In the week ending 23 August 2026, Bitcoin rose from roughly $62,000 to almost $80,000. In dollar terms it was the largest weekly gain in the asset’s history — about $14,000 per coin in seven days — and in percentage terms (around 23%) the strongest week since the banking stress of March 2023. Spot Bitcoin ETFs took in close to $1.9 billion over the same days, their biggest weekly inflow in ten months.

Moves like that don’t come out of nowhere. This one had a very specific trigger, and it came from the US Treasury, not from the crypto industry. If you run a business and hold your reserves in cash, the trigger matters more than the price.

What actually happened: the Treasury started buying its own long bonds

On 19 August, Treasury Secretary Scott Bessent announced that the department would at least double its buybacks of long-dated government debt — from $2 billion to $4 billion per operation, targeting the 10- to 30-year part of the curve, between 9 September and 4 November. The next day he went on television and said the amount could be larger still, describing the aim as “making a market” in long bonds because liquidity in the 30-year had become thin. Analysts immediately called it a “Treasury Twist”, a nod to the Fed’s 1960s Operation Twist. Reports followed that the Treasury could draw on its roughly $950 billion cash account (the Treasury General Account) to fund purchases.

Why would a government buy back its own debt? Because the price of that debt had been falling and yields had been climbing to levels not seen in almost twenty years. The 30-year bond was trading above 5.2%, a level last seen before the 2008 financial crisis. The US cannot comfortably afford to refinance $39 trillion at those rates, so the Treasury stepped in.

This is not yet yield curve control — the Treasury is not announcing a cap and defending it with unlimited purchases. But it is a signal that a ceiling exists in the minds of policymakers, and that the government will intervene when yields approach it. Markets read the signal exactly that way: the dollar dropped, gold rose to its highest level since May, and the “debasement trade” — buying hard assets because the unit of account is being managed — returned in force. Bitcoin, arguably the hardest asset of all, moved the most.

Then the market called the bluff

The relief did not last. Yields fell for a day and then climbed back. The first expanded buyback on 9 September saw weaker-than-expected purchases, the Treasury tripled the size to $6 billion, and the 10-year yield still pushed to around 4.9–4.97% — its highest since October 2023. As of 11 September the 10-year sits near 4.95%, roughly 0.9 percentage points higher than a year ago, and the 30-year above 5.2%.

Three forces are pushing against the Treasury’s buybacks at the same time: energy prices driven by the Iran conflict, a record wave of corporate bond issuance (AI companies alone have reportedly issued more than $1.5 trillion this year), and Japan selling Treasuries to defend the yen. A few billion dollars of buybacks per operation is not enough to overpower that. Which raises the obvious question: what is the next tool?

The Iran conflict the West keeps downplaying

The war with Iran, now roughly six months old, is the main reason inflation is back on the table. Brent crude has been trading above $105.

Washington says the Strait of Hormuz is open and that dozens of ships pass daily. The data say otherwise. Before the war, roughly 100 vessels a day transited the strait, more than half of them tankers. In early September, Kpler counted a ten-day average of about 13 vessels per day, with single days as low as five or six; Lloyd’s List Intelligence recorded around 12 per day for the last week of August; the IMF’s PortWatch logged six transits on 6 September against a pre-crisis baseline of 85. The Joint Maritime Information Center rates the risk level “severe” and describes traffic as far below baseline, citing the continued danger of drifting mines.

Put simply: the strait is “open” in the sense that a few pre-approved ships get through. Traffic is running at around 10% of normal. Gulf crude exports have fallen from about 17 million barrels a day in 2025 to roughly 9 million as of August. That is not a temporary supply hiccup; it is a structural shock feeding straight into producer prices, which rose 5.4% year over year in August.

For the Fed this is a dilemma. For the Treasury it is a bill.

The arithmetic behind the buybacks: why the US cannot pay higher rates

The reason the Treasury is willing to intervene in its own bond market becomes obvious once you look at the numbers.

  • The Congressional Budget Office projects net interest costs of about $1.0 trillion in fiscal 2026 — 3.3% of GDP and roughly 14–15% of all federal spending. In the first ten months of the fiscal year the government has already paid $963 billion in net interest.
  • On current projections interest costs more than double to $2.1 trillion by 2036, when they would consume nearly a fifth of the federal budget.
  • Debt held by the public is about 100% of GDP today and is expected to surpass the post-World War II record (106%) around 2030. Deficits are running near 7% of GDP with no recession in sight.

The Committee for a Responsible Federal Budget has warned that under the CBO baseline the average interest rate the government pays could exceed the economy’s growth rate from fiscal 2031 — the textbook condition for a debt spiral, in which interest costs push up borrowing, higher borrowing pushes up rates, and the loop feeds itself. Jared Bernstein, chair of the Council of Economic Advisers under President Biden and long a sceptic of debt alarmism, wrote in May that anyone not worried about the US fiscal outlook is not paying attention. This is no longer a fringe view; it is a mainstream one across the political spectrum.

The core problem is simple. Spending is too high and what the state takes in — receipts — is too low. The US now carries debt ratios that were, until recently, associated with emerging-market crises rather than reserve-currency issuers.

Why it still works — for now

The system holds because the United States can export its currency. Treasury bills remain the collateral and settlement layer of global finance, and there is no alternative of comparable depth. As long as the world needs dollars, the US can run deficits that would sink any other country.

But “there is no alternative today” is not the same as “there will never be one”. Central banks have been steadily adding gold; gold above $5,000 an ounce this year is the clearest expression of that. Bitcoin is the newer, more portable version of the same trade, and its market capitalisation is still a fraction of gold’s. Positioning happens before the alternative is obvious, not after.

What a loss of trust looks like

It helps to be concrete about what “loss of confidence” means for ordinary businesses. In Turkey, the lira lost the large majority of its value against the dollar over three years while official inflation ran above 60–80%; a company’s cash reserve simply melted. In Venezuela, savings held in bolívars became worthless within months. In both cases the trigger was not a single event but the moment the population stopped trusting the authority issuing the money. Once that happens it moves fast — weeks, not years.

The United States is nowhere near that point. But the toolkit it is now reaching for looks familiar. Doubling buybacks, then tripling them. Funding those buybacks by issuing more short-term bills or drawing down the cash account, and shifting the debt profile toward shorter maturities — so that every future rate move hits the interest bill faster. It is, in effect, financing the mortgage with the credit card. If the Treasury’s balance sheet proves too small, the historical next step is the central bank’s balance sheet: newly created money buying long-term government debt. That is how every previous episode of yield management has ended.

Don’t expect the Fed to help before the midterms

A common assumption is that the Fed will cut rates into the November midterms to flatter the economy. The evidence points the other way. The federal funds rate sits at 3.50–3.75%. The FOMC held in July on a 9–3 vote, with three members preferring a hike. After Chairman Kevin Warsh’s Jackson Hole speech — where he said summer inflation readings did not show a meaningful improvement in the underlying trend — markets moved to price a better-than-even chance of a hike at the 15–16 September meeting. The White House, Vice President and Treasury Secretary have all publicly pressed the Fed not to raise rates, which tells you how the incentives are lined up.

So the picture for the rest of 2026 is: a Treasury trying to push long yields down, a Fed reluctant to cut short rates, an energy shock keeping inflation sticky, and a debt load that grows more expensive with every basis point. Hard assets tend to do well in exactly that combination.

What this means for your company’s reserves

None of this is a reason to panic, and none of it is a reason to turn your business into a trading desk. It is a reason to ask a boring question seriously: what is our long-term cash actually buying in five years?

For most SMEs the sensible response is the one we described in Why Every Company Needs a Bitcoin Strategy:

  1. Separate operating cash from long-term reserves. Payroll, VAT and suppliers stay in fiat. Money you will not need for years is where the question applies.
  2. Write a one-page treasury policy. How much Bitcoin, for what purpose, under what conditions you add or reduce. Decide this before the next 20% week, not during it.
  3. Solve custody properly. Multi-approval setups, no single point of failure, a documented process for staff changes. See the five barriers article for the practical checklist.
  4. Enter gradually. A defined schedule removes the temptation to time headlines like the buyback announcement.
  5. Frame it correctly. Internally and externally, this is a risk-management decision about the unit of account, not a bet on price.

The Treasury just told the market, in plain language, that it will manage the price of its own debt. Businesses that hold their reserves in that debt, or in the currency built on it, are on the other side of that policy. Bitcoin’s record week was the market noticing.


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Bitcoin for Business works with owners and finance teams in Switzerland and across Europe to define scope, set guardrails, choose custody and integrate Bitcoin into existing bookkeeping — without disrupting operations. Write to info@bitcoinforbusiness.org or use the contact form to arrange a first conversation.


FAQ

Is the US Treasury doing yield curve control? Not formally. Yield curve control means announcing a target yield and buying unlimited bonds to defend it. The Treasury has increased discretionary buybacks of long-dated debt ($4–6 billion per operation) to support liquidity and push yields lower. It is a step in that direction and a signal about where policymakers’ pain threshold lies.

Why did Bitcoin react so strongly to a bond announcement? Because buybacks financed with short-term debt or cash reserves imply that the government would rather manage bond prices than let the market set them. That weakens the dollar’s credibility as a store of value and pushes capital toward assets with fixed supply. Bitcoin’s supply is capped at 21 million.

Is the Strait of Hormuz open? Officially yes; practically, traffic is roughly 10% of pre-war levels — around 6–13 ships a day versus 85–100 before the conflict, according to Kpler, Lloyd’s List Intelligence and IMF PortWatch.

Should a small business put all its reserves in Bitcoin? No. A measured allocation of long-term reserves, backed by a written policy and proper custody, is the approach that survives volatility and stakeholder scrutiny.


Sources: CNBC (19, 20, 21, 24 Aug; 5 Sep 2026), Bloomberg (19 & 21 Aug 2026), Council on Foreign Relations (20 Aug 2026), Galaxy Research via Bitcoin.com News and CryptoTimes (Aug 2026), Al Jazeera (27 Aug & 3 Sep 2026) citing Kpler, Lloyd’s List Intelligence and JMIC, IMF PortWatch, Trading Economics (11 Sep 2026), Congressional Budget Office February 2026 baseline, Committee for a Responsible Federal Budget, Bipartisan Policy Center deficit tracker, The Fiscal Times (27 May 2026). This article is not investment advice.