When national debt grows too large, an economy enters "fiscal dominance." The central bank loses its ability to manage the economy, as raising rates causes hyperinflation to cover debt payments while lowering them creates massive asset bubbles, leaving no good options.

Unlike the post-GFC era, governments now lack the fiscal and monetary flexibility to cushion every economic shock due to high debt levels. This is forcing global markets to trade on their own fundamentals again, creating volatility and relative value opportunities reminiscent of the pre-2008 era.

The US is not facing a single issue but a convergence of multiple stressors. Unsustainable fiscal policy, fragile funding markets, geopolitical shifts, energy production issues, and leveraged financial players create a highly volatile environment where one failure could trigger a cascade.

Despite recent concerns about private credit quality, the most rapid and substantial growth in debt since the GFC has occurred in the government sector. This makes the government bond market, not private credit, the most likely source of a future systemic crisis, especially in a rising rate environment.

'Fiscal dominance' occurs when government spending, not central bank policy, dictates the economy. In this state, the Federal Reserve's actions, like interest rate cuts, become largely ineffective for long-term stability. They can create short-term sentiment shifts but cannot overcome the overwhelming force of massive government deficit spending.

The long-term health of U.S. fiscal policy appears heavily dependent on a future surge in corporate capital expenditures. This spending is expected to fuel a growth burst specifically in the manufacturing and AI sectors, driven by the strategic imperative to outcompete China.

Large, ongoing fiscal deficits are now the primary driver of the U.S. economy, a factor many macro analysts are missing. This sustained government spending creates a higher floor for economic activity and asset prices, rendering traditional monetary policy indicators less effective and making the economy behave more like a fiscally dominant state.

The current expectation for legislative stalemate could be completely upended by a significant economic downturn. A recession would make fiscal stimulus more politically appealing to both parties, consistent with historical patterns, creating an environment for policy action that otherwise seems unlikely given the political landscape.

When countries run large, structural government deficits, their policy options become limited. Historically, this state of 'fiscal dominance' leads to the implementation of capital controls and other financial frictions to prevent capital flight and manage the currency, increasing risks for investors.