The Treasury Is Buying Bonds. So Why Are Yields Rising?

Here is a puzzle that can confuse even experienced traders.

The US Treasury is actively buying back long-term government bonds. It doubled the size of its buyback operations in August — from $2 billion to $4 billion per operation — specifically targeting the 10-to-30-year sector where yields had been climbing.

Buying bonds should, in theory, push their prices up and their yields down. That is how supply and demand works: if a major buyer enters the market, prices should rise. But that is not what happened.

On September 9, the 30-year Treasury yield hit 5.29%, a 19-year high, while the 10-year yield climbed to 4.84%. Stocks sold off. And the US Dollar actually fell, with the DXY sliding toward the lower half of its yearly range.

So how can the Treasury be buying bonds while yields are still rising?

The answer is not that the buyback "failed." The answer is that the buyback was never large enough to matter to the overall Treasury market.

The size of a flow matters more than the fact that the flow exists.

1. The Buyback: What It Actually Is

On August 19, the US Treasury announced that it would increase the size of its buyback operations from $2 billion to $4 billion per operation, effective September 9 through November 4. The buybacks focus on older, less liquid Treasury bonds in the 10-to-30-year maturity range.

Now compare that with the size of the market:

• Total marketable Treasury debt outstanding: approximately $30 trillion
• Each buyback operation: $4 billion
• Daily Treasury trading volume: routinely hundreds of billions of dollars

The Treasury buyback is therefore a targeted liquidity operation, not a quantitative easing program. Its purpose is to improve market functioning in specific, older bond issues. It is not designed to suppress the overall yield curve or stimulate the economy.

That distinction matters because the headline — Treasury is buying bonds — naturally creates the assumption that Treasury buying should push yields lower. But a $4 billion buyback in a roughly $30 trillion market is simply not large enough to determine the direction of the overall yield curve. The Treasury is trying to manage liquidity in specific securities; the broader bond market is still being driven by much larger forces.

2. Why Yields Rose Anyway

The Market Is Bigger Than the Buyback

The Treasury buyback is one flow. The Treasury market is a vast ecosystem of daily buying and selling, including:

• Primary issuance: the Treasury must issue new bonds to finance the government's deficit and refinance maturing debt.
• Foreign demand: central banks, sovereign wealth funds and foreign institutions hold roughly $8 trillion in Treasuries.
• Domestic institutional demand: pension funds, insurers and mutual funds continually adjust holdings based on liabilities, regulations and yield expectations.
• Fed policy: the Federal Reserve influences yields through its policy rate and forward guidance, even when it is not actively buying bonds.
• Speculative positioning: hedge funds and other traders position based on their expectations for inflation, growth and Fed policy.

The $4 billion buyback is only one small piece of a much larger supply-and-demand equation. The better question is not "Is the Treasury buying bonds?" but:

Investors are demanding higher yields amid concerns about persistent inflation, large fiscal deficits, uncertainty around the Fed's path and the sheer amount of long-term debt the market needs to absorb. That is why yields can rise even while the Treasury is buying bonds.

3. The Cross-Asset Chain

This is where the story becomes particularly useful for FX traders. The buyback itself did not drive yields higher — but rising yields created a chain reaction across markets.

Treasury yields ↑. When long-term yields rise, borrowing costs across the economy tend to rise as well — mortgages, corporate borrowing and other financing become more expensive.

Financial conditions tighten → equities under pressure. Higher yields make fixed income more attractive relative to stocks, and they raise the discount rate applied to future earnings, reducing their present value. That hits rate-sensitive sectors such as technology and real estate hardest. What we observed: equities sold off as yields climbed.

**US yields ↑ → USD does not necessarily rise.** This is where the textbook relationship breaks down. Normally higher US yields can make dollar assets more attractive and support the USD. But this time the dollar fell even as yields rose — because the reason for the yield increase matters:

• Yields rising on stronger growth: generally supportive for USD.
• Yields rising on fiscal or inflation concerns: much more ambiguous for USD.

Higher real yields → gold under pressure. Gold pays no interest, so when real yields rise the opportunity cost of holding it increases; a stronger dollar can add a further headwind. But this relationship is not one-to-one — gold is also driven by sentiment, central-bank buying and longer-term confidence in fiat currencies.

4. So What Is Actually Driving Yields?

If the buyback isn't driving the increase, what is?

• Fiscal supply. The government keeps issuing large volumes of Treasuries to finance the deficit and refinance debt. The more supply the market must absorb, the more yield investors may require — unless demand rises proportionally.
• Inflation expectations. Investors care about the purchasing power of future cash flows. If inflation expectations stay sticky or rise, nominal yields may need to rise to compensate.
• The Fed's path. Markets constantly reassess how aggressively the Fed might cut, hold or tighten. If data stays resilient or inflation proves persistent, the Fed may cut less than expected — which supports yields.
• Term premium. The extra compensation investors demand for holding longer-dated bonds. Concerns about future inflation, fiscal uncertainty or long-term debt supply can push it higher — especially important for the 30-year, which is far more sensitive to long-term expectations than the 2-year.
• Foreign demand. Foreign institutions are major holders. If their demand weakens, domestic investors must absorb more supply, and may demand higher yields to do so.

The common thread: these are much larger and more persistent forces than a $4 billion buyback. So the yield rise is better understood as a repricing of the risk premium for holding long-term US debt, not a reaction to the Treasury's buyback.

5. The Lesson

Don't confuse an action with the market's reaction.

The Treasury's buyback is a real policy action. But whether it moves prices depends on three things:

• The size of the action relative to the market. $4 billion is small against a $30 trillion Treasury market.
• The direction of the larger forces. If fiscal supply, inflation concerns and term premium are pushing yields higher, a small technical operation is unlikely to reverse the trend.
• How the market interprets the action. The buyback was understood as a liquidity-management tool, not an attempt to suppress long-term yields — so the market could absorb it without changing the broader trend.

The beginner mistake is to read "Treasury buys bonds → yields must fall," or "yields rose → the buyback failed." Neither conclusion is necessary. The better question is: is this policy action large enough to matter relative to the structural forces already moving the market? That is the reasoning skill we want to build.

Key Takeaways

• The Treasury buyback is too small to determine the overall yield curve — at $4bn per operation vs ~$30tn of marketable debt, it is primarily a liquidity-management tool.
• Yields are rising because of larger forces: Treasury supply, inflation expectations, Fed uncertainty, term premium and investor demand.
• A government can buy bonds while yields still rise — prices are set by the balance of all major flows, not one buyer.
• The dollar's response to higher yields depends on why yields are rising: growth-driven increases tend to support USD; fiscal- and inflation-driven increases can be much more ambiguous.
• Don't trade the headline. Ask what changed, how large the flow is, and what the rest of the market is doing.

This article is part of the FXStrength Learning Path. For more on how yields, expectations and fiscal policy drive currencies, see The US Debt Crisis. Why Should FX Traders Care?

References

• US Treasury — Treasury Announces Increase in Buyback Operations.
• Standard Chartered — Market Watch, August 2026.