For decades, the Fed stabilized the economy with one simple tool: interest rates. Raise them to cool inflation, and cut them to stimulate growth. But after years of massive government borrowing, post-pandemic inflation, and repeated stress inside the Treasury market, that system may no longer work the way Americans expect.
Today, the Fed can cut rates while long-term borrowing costs stay elevated, mortgage rates remain high, and bond markets react as if the central bank is losing control of the financial system’s most important lever.
At the same time, it has also resumed expanding parts of its balance sheet again to support market liquidity, raising a bigger question on Wall Street: if emergency support is still needed during relatively calm periods, what happens during the next real crisis?
The Fed controls less than you think
Most Americans are familiar with a simplified version of US monetary policy: the Federal Reserve sets interest rates, and when those rates move, the rest of the economy follows.
What that framing leaves out is that Fed Chair Jerome Powell and the FOMC only directly control the federal funds rate, which governs overnight lending between banks and has no direct relationship to what a homebuyer pays on a 30-year mortgage, what the government pays to service its debt, or what a corporation pays to borrow for a decade.
The Fed sets the price of very short-term money, while long-term money operates on completely different terms, driven by the collective judgment of bond investors rather than a committee vote.
The rate that actually drives most real-world borrowing is the 10-year Treasury yield. It responds to a different set of forces than the federal funds rate: inflation expectations over a full decade, the volume of new bonds hitting the market, and investor confidence in the U.S. government’s long-term fiscal trajectory.
For the better part of the last 50 years, those forces ran in roughly the same direction as Fed policy, because the bond market essentially trusted that inflation was contained and that the government wasn’t borrowing at a structurally destabilizing pace. When the Fed cut rates, bond investors generally followed, and long-term yields fell alongside short-term ones.
The last six years broke that relationship. After the pandemic, the US government borrowed at a scale with no modern parallel, and the Treasury market has had to absorb the resulting volume. Federal debt reached $37.6 trillion as of September 2025, with annual interest payments hitting $1.2 trillion in fiscal year 2025 alone, and the Congressional Budget Office projects deficits above $2 trillion annually for the next decade.
Treasury issued $30.2 trillion in marketable securities across fiscal year 2025 to refinance maturing debt and fund new borrowing. The $30.2 trillion represents 36% of GDP and an extraordinary volume for any market to absorb without demanding higher compensation.
Bond investors have responded accordingly, pricing US debt with an eye on deficit trajectories and issuance pipelines rather than simply waiting for the next FOMC decision.
The result was what RBC Wealth Management analysts described as a modern inversion of Alan Greenspan’s famous conundrum. Where Greenspan found that rate hikes in the mid-2000s failed to lift long-term yields, Powell has found that rate cuts since 2024 are failing to pull them down.
When the Fed trimmed 100 basis points across three cuts at the end of 2024, the 10-year yield barely moved. By September 2025, after a further cut, the 10-year was nearly unchanged from where it had sat a full year earlier, despite multiple rounds of easing. The bond market had effectively decoupled from the Fed’s rate cycle.
The fallout is no longer abstract
The first place that decoupling shows up is housing, where mortgage rates follow the 10-year Treasury far more closely than they track the federal funds rate. This meant that when the 10-year refused to fall, the cost of buying a home stayed elevated alongside it.
The 30-year fixed rate briefly touched 6.08% ahead of the September 2024 cut, then spent most of the following year hovering between 6.8% and 7.1% even as the Fed was officially in an easing cycle.
The spread between the 30-year fixed mortgage and the 10-year Treasury, which historically runs 1.5 to 2 percentage points, stretched to 3 points through much of 2023 and 2024, compounding the damage to affordability. Buyers who expected relief after three consecutive Fed cuts watched that hope vanish within weeks as bond markets repriced the fiscal and inflation outlook.
Government finances are running into the same pressure from the other direction. When borrowing costs stay elevated across the yield curve, they feed directly into the cost of refinancing the national debt, and with $9.1 trillion in maturing securities needing to be refinanced in fiscal year 2025 alone, even modest yield increases translate into substantial additional interest expense.
The CBO forecasts net interest as a share of federal outlays rising from 13.55% in FY2025 to over 14% by FY2027, a feedback loop that generates its own upward pressure on yields as investors reassess long-term sustainability.
There’s also the issue of the balance sheet. After shrinking by more than $2.2 trillion since mid-2022 through quantitative tightening, the FOMC announced in October 2025 that it would cease runoff starting in December, then began purchasing Treasury bills through Reserve Management Purchases to keep money markets functioning.
Fed officials have described these as technical liquidity operations. As CryptoSlate reported in December 2025, institutional macro desks are careful to distinguish them from the large-scale asset purchases that define true QE. In practice, the Fed is once again expanding its balance sheet during conditions that don’t resemble an acute crisis, and that shows just how much structural support core markets now require just to function on a routine basis.
For Bitcoin and the broader crypto market, this structural shift has been reshaping how price forms in ways that have become increasingly difficult to separate from the broader macro picture.
As CryptoSlate has covered extensively, Bitcoin’s near-term trajectory has come to be driven by Treasury supply, real yields, and Fed liquidity dynamics rather than crypto-specific demand, with IMF research finding that Fed tightening transmits directly into crypto risk appetite.
The 30-year Treasury yield recently climbed toward 5.1%, pulling institutional capital toward guaranteed government yield and raising the hurdle for holding volatile assets.
Bond traders were fully pricing in a Fed rate hike by year-end 2026 as recently as last week, a reversal from the cuts-ahead consensus that underwrote most of the 2024-2025 risk rally, with Barclays having moved its first expected cut out to March 2027 as the tailwind that crypto markets spent 18 months pricing in has been repriced away almost entirely.
The corner the Fed now occupies is genuinely uncomfortable, and it tightens in both directions. Rate hikes expose fragility in a fiscal structure where interest payments already consume $1.2 trillion annually, and where the debt load has no modern historical parallel.
Rate cuts risk being read by bond investors as signals of distress rather than confidence, nudging long-term yields upward even as short-term rates fall. And the kind of liquidity support that once marked real emergencies now looks and feels like a structural requirement of the system rather than a temporary fix.
America’s financial architecture was built on the assumption that the Fed could always restore stability with enough monetary firepower. As the bond market’s behavior over the past 18 months keeps demonstrating, that assumption is now being tested against a reality that didn’t exist a decade ago.