Sep 3, 2026 · 45 min
Listen from 28:07
Listen at 28:07
Treasury supply tests the bond market’s capacity
What's Behind the Big Surge in US Government Bond Yields
Rising yields reflect not only inflation and fiscal concerns but also whether dealers and markets can absorb unprecedented government borrowing.
- 1Heavy Treasury issuance is colliding with constrained dealer balance sheets, making market capacity central to the yield debate.
- 2Treasury buybacks can improve liquidity by removing illiquid securities, but they are not equivalent to forcing borrowing costs lower.
- 3Shrinking the Federal Reserve’s balance sheet faces practical limits because reserves, currency, and the Treasury General Account remain essential liabilities.
Don't miss
Darrell Duffie explains why routine Treasury buybacks can remove illiquid market “dust” without becoming an attempt to force borrowing costs lower.
The brief
Darrell Duffie links rising long-term yields to the scale of Treasury issuance, constrained dealer balance sheets, inflation concerns, and doubts about the market’s capacity to absorb debt.
The discussion distinguishes Treasury buybacks from quantitative easing: removing illiquid off-the-run securities can improve trading conditions without necessarily lowering the government’s borrowing costs.
Duffie argues that shifting issuance toward short-term bills could reduce long-term pressure but would expose taxpayers to greater interest-expense volatility as rates change.
The episode’s sharpest policy tension concerns the Federal Reserve’s balance sheet, whose size and composition cannot simply return to the pre-2008 low-reserve system.
The broader takeaway is that market plumbing matters, but extraordinary intervention should be reserved for genuine dysfunction rather than routine efforts to suppress yields.
What was said on this episode
22 statements · 6 positive · 10 negative · 1 mixed · 5 neutral
Dealers currently have more balance-sheet capacity despite massive trading volumes.
“But even with the massive amounts of trading we're seeing today, the dealers have more space yet.”
Listen at 5:24
Foreign central banks are no longer increasing their Treasury purchases.
“The foreign central banks. They have had what they need for a long time now. They're not buying more.”
Listen at 7:02
Government deficits and debt-to-GDP ratios are exceptionally high and continuing.
“government deficits and debt to GDP are spectacularly high and there's no end in sight.”
Listen at 8:26
Government debt has grown substantially relative to GDP.
“So what's changed is the sheer volume of government debt relative to GDP, it marches on and on.”
Listen at 9:29
US Treasury debt is about $32 trillion and rising $2 trillion annually.
“$32 trillion and rising at $2 trillion a year.”
Listen at 10:41
Hyperscaler debt may reach $1 trillion but remains small relative to Treasury debt.
“Hyperscalers are. perhaps going to hit a trillion of debt in the next couple of years. that's small compared to the Treasury Department.”
Listen at 10:46
Long-term bond investors primarily focus on bond supply relative to demand.
“I think they're looking at the supply relative to the demand.”
Listen at 13:16
The FOMC will avoid entering fiscal dominance.
“The FOMC will do everything possible not to get into fiscal dominance.”
Listen at 17:36
Bond markets have more power than the Treasury to set yields.
“even the mighty U.S. Treasury Department is not as powerful as bond markets when it comes to setting yields.”
Listen at 19:31
Shortening government debt maturity would increase interest-expense volatility.
“that would be a formula for increasing the interest rate expense volatility for the U.S. government because your debt maturity is going to be shorter and shorter.”
Listen at 21:13
The Treasury cannot strongly control yields if markets push them to 6%.
“if markets decide that yields are going to be at 6%, the U.S. Treasury Department is not going to be able to have a strong say in that.”
Listen at 22:16
Routine Treasury buybacks improve liquidity and can benefit taxpayers.
“make the Treasury market more liquid by replacing those with new liquid Treasuries, and implicitly make some money for the U.S. taxpayer by buy low, sell high. And that's a good program.”
Listen at 23:38
Treasury buybacks could be expanded to hundreds of billions of dollars.
“that could be done on a scale of hundreds of billions, not the mere $4 to $8 billion that the Treasury Department has been speaking about over the last couple of weeks.”
Listen at 25:00
Dealer balance sheets and Treasury-market liquidity measures are normal.
“dealer balance sheets seem to be in good shape. Bit offer spreads, market depth are in normal range.”
Listen at 25:22
A few billion dollars of buybacks will not materially move Treasury yields.
“a few billion dollars is just not going to move the needle.”
Listen at 29:42
Sustained long-term issuance would eventually create concerning short-term debt accumulation.
“if they were to continue to keep the issuance of long-term securities at current levels, as they have been, and have forecasted that they will, if they were to keep doing that for years, then the piling up of short-term debt would eventually be notable, and it would cause concern.”
Listen at 30:39
A smaller Federal Reserve balance sheet would signal reduced market activism.
“a smaller balance sheet would signal that.”
Listen at 32:00
Reserves are the only significant Federal Reserve liability that can be reduced.
“the only significant possible reduction is in reserves”
Listen at 33:04
Banks are unlikely to relinquish reserves because they serve multiple valuable functions.
“It's the Swiss army knife of finance. We're not going to give those up easily.”
Listen at 34:33
The Fed task force will recommend replacing long-term Treasuries with bills.
“I predict that they will recommend reducing the quantity of long-term Treasury securities that the Fed holds and replacing those with Treasury bills.”
Listen at 35:46
The Fed need not shrink its balance sheet but should develop tools to do so.
“In my own view, the Fed doesn't need to reduce the size of its balance sheet, but it should have the tools that would allow it to do that.”
Listen at 36:32
The term premium changes over time with Treasury issuance volume.
“it changes over time depending on one of the things that we just discussed earlier, which is the volume of Treasury issuance.”
Listen at 38:49
Statements are attributed to the speaker as said on the episode and reflect their view at the time, not PodLume's. They are not advice.