The "reverse conundrum" is the central diagnostic of the current monetary moment. From September 2024 through early 2026, the Federal Reserve cut its policy rate by 100 basis points. Over the same period, the 10-year Treasury yield rose by 100 basis points. The Fed was cutting; the market was tightening. This is not a broken transmission mechanism — it is a functioning one, transmitting a message the Fed cannot override: the risk premium on US sovereign debt is rising faster than the policy rate is falling.

This is fiscal dominance. It occurs when a government's debt load is large enough that monetary policy loses its primary channel of influence. Normally, the Fed cuts rates, bond yields fall, mortgage rates decline, borrowing becomes cheaper, economic activity accelerates. In a fiscally dominant environment, bond investors demand higher yields to compensate for sovereign credit risk, regardless of what the short rate is. The result is that Fed easing actually fails to ease — and in some scenarios, it worsens sentiment by signaling that the Fed is prioritizing growth over inflation discipline, inviting further yield increases.

The bond vigilantes — institutional investors who enforce fiscal discipline by selling sovereign bonds when they believe a government is living beyond its means — have historically been a theoretical threat. They are now an active force. High-yield spreads near 20-year lows represent complacency that cannot survive contact with the deteriorating data. BNY projects that high-yield spreads could widen by 200+ basis points in a slowdown scenario. Investment-grade spreads have similar exposure. When spreads widen — and every historical analogue suggests they will — the repricing will be rapid and self-reinforcing: wider spreads raise borrowing costs for corporations, impairing their ability to refinance the $930 billion in debt maturing in 2026, increasing default risk, which widens spreads further.

The 30-year Treasury approaching 4.93% and Goldman Sachs projecting the 10-year at 4.40% by year-end represent baseline forecasts built before the Iran war, before the private credit run, and before the February jobs catastrophe. The scenarios being tracked in this document imply materially higher yields — and at 5%+ on the 10-year, the mortgage market freezes, the corporate refinancing wall becomes impassable for a significant fraction of issuers, and the US deficit arithmetic becomes openly insolvent in the eyes of the market.