The US Treasury Department has escalated its campaign to bring down surging bond yields, tripling the maximum size of its bond buyback program from $2 billion to $6 billion per operation. But a disappointing initial response from investors and persistent skepticism from economists raise real doubts about whether the effort can meaningfully move the needle.

How the Program Has Escalated

The Treasury first surprised markets on August 19 when it announced it would at least double its buyback limit from $2 billion to $4 billion per operation, targeting the sensitive 10-to-20-year and 20-to-30-year segments of the Treasury market, with the change running from September 9 through November 4. That announcement briefly sent yields sharply lower and stock futures surging, with the 10-year note falling 5.7 basis points to 4.647% and the 30-year bond tumbling 9 basis points to 5.196%. Weeks later, on September 10, Treasury tripled that original limit again, raising it to $6 billion per operation, in an effort to "tamp down surging bond yields" as the 30-year yield touched 5.3%, not far below its post-2008-crisis high of 5.33%.

Why Yields Have Been Climbing So Fast

The 10- and 30-year bond yields are up roughly 70 and 45 basis points, respectively, since the start of the year. Investors have been fleeing the bond market globally, citing persistent inflation, economic uncertainty tied to the Iran war, and mounting government debt — the US national debt crossed the $40 trillion threshold just last month.

The First Test Didn't Go Well

The program's most recent operation offered a real-world test — and the results weren't encouraging. Rather than the roughly $20 billion in offers Treasury normally receives, the $6 billion buyback drew only $10 billion of offers. Treasury Secretary Scott Bessent pushed back hard on characterizations of the operation as a failure, telling conservative strategist Steve Bannon on "War Room": "This whole nonsense today that our operation didn't work — well, our operation didn't work, because we only had $10 billion of offers for our buyback program. Normally, we get $20 billion, and we only buy the bonds back cheap. People seem to want to keep their long-term bonds... So, it's a bunch of noise, and in my career, I made money ignoring the noise."

Why the Buyback Didn't Lower Mortgage Rates

Despite the operation, mortgage rates didn't budge as hoped. Yields were mixed the day after, with the 10-year Treasury remaining just below 5%. Matthew Graham, editor of Mortgage News Daily, attributed the muted result not to the buyback itself, but to a surge in oil prices and a "poorly received" Producer Price Index reading. "Even though Treasury buybacks ultimately imply more Treasury sales, they can temporarily boost demand and put downward pressure on rates," Graham wrote. "If the buyback amount is lower than expected, that means less demand than expected and higher rates, all else equal."

The Fundamental Skepticism

Beyond the immediate technical execution, several economists have raised a more structural objection: the buyback doesn't address the underlying cause of rising yields. "If you want to get Treasury yields under control, you would tackle that issue. Instead, we are tinkering on the periphery of the market, and that's not a real solution," one Wall Street analyst told CBS News. Columbia Business School economist Brett House was similarly direct: the bond buyback "doesn't solve the fact that the US is running a large deficit that needs to be financed." He added: "Unless Bessent forces the Fed to print money to buy these bonds, it is still coming out of Treasury revenues, and doesn't cure the fact that this government is building up a deficit and as a result is going to have to issue more debt."

A Modest Historical Precedent

The closest historical comparison to the current program is the Federal Reserve's 1961 "Operation Twist," in which the Fed sold shorter-term Treasuries and bought longer-term ones without expanding its balance sheet. Researchers at the Federal Reserve Bank of San Francisco have estimated that intervention lowered long-term Treasury yields by only a modest amount — a precedent that suggests even a well-executed buyback program is likely to have a limited, rather than transformative, effect on the broader yield curve.

The Program's Structural Limitation

Analysts at Forbes noted a key mathematical reality: because the buyback program is small relative to the $31.8 trillion Treasury market, it will likely only raise prices for the specific bonds Treasury directly purchases, rather than deliver a lasting, market-wide boost to bond or stock prices. What the program can do, however, is send a signal — evidence that Treasury is willing and able to act — even if the direct mechanical effect remains limited.

A Warning About What the Signal Really Means

Some economists have flagged a less reassuring interpretation of that signal: when Treasury announced the initial buyback expansion in August, some warned it suggested the government's borrowing needs are taking precedence over price stability, and that markets might read the move as evidence policymakers are increasingly willing to tolerate inflation — a dynamic that could backfire if investors respond by demanding even higher yields as compensation for that perceived inflation risk.

A Deeper Pool of Ammunition

Beyond the buyback program itself, reports indicate Bessent could tap the Treasury's near-$1 trillion General Account (TGA) to fund additional bond purchases if needed. While using the TGA would mean the government has less cash on hand in the event of a debt-ceiling standoff, the latest estimates suggest a new debt limit fight isn't expected until winter or early spring — giving Treasury some room to draw down that account if it wanted to intensify its yield-suppression efforts further.

The Council on Foreign Relations' Assessment

Rebecca Patterson of the Council on Foreign Relations offered a broader framing: durable relief for yields would most realistically come from either a resolution to the Iran war — which would ease pressure on oil supplies moving through the Strait of Hormuz — or a genuine slowdown in economic growth and inflation. Notably, as of mid-August, the median analyst forecast on Bloomberg suggested Brent crude would fall below $76 a barrel by year-end from levels above $91 at the time — meaning any anticipated energy-driven relief was already largely priced into the market, limiting how much further it could pull yields down even if that forecast holds.

What This Means for Everyday Borrowers

For consumers, the stakes are direct: higher Treasury yields raise borrowing costs across mortgages, auto loans, and business credit, while also weighing on stock market valuations. If the buyback program fails to meaningfully lower yields, Americans could continue facing elevated borrowing costs for the foreseeable future, regardless of how aggressively Treasury expands its purchases.

The Bottom Line

Anthony Chan, former chief economist for J.P. Morgan Chase, called Bessent's underlying goal — pushing the 10-year yield lower to bring down 30-year mortgage rates — "commendable." But between the disappointing $10 billion response to the first $6 billion operation, the program's small scale relative to the overall Treasury market, and economists' persistent warnings that buybacks don't address the deficit driving yields higher in the first place, the effort faces genuine headwinds. For live Treasury yield data, see the US Treasury's daily yield curve rates.

Whether Bessent's escalating buybacks eventually bend the yield curve, or simply add liquidity at the margins while the deeper structural pressures — debt, deficits, and geopolitical risk — continue pushing rates higher, remains an open question that only the coming weeks of auctions and economic data will answer.