Global demand for dollars as the reserve currency forces the U.S. to run persistent trade deficits to supply them. This strengthens the dollar and boosts import power but hollows out the domestic industrial base. A future decline in dollar demand would create a painful economic transition.

While U.S. fiscal deficits remain high, new tariffs are reducing the trade deficit. This means fewer U.S. dollars are flowing abroad to foreign entities who would typically recycle them into buying U.S. assets like treasuries. This dynamic creates a dollar liquidity crunch, strengthening the dollar.

Massive investment requires issuing assets (bonds, equity), creating supply pressure that pushes prices down. The resulting spending stimulates the real economy, but this happens with a lag. Investors are in the painful phase where supply is high but growth benefits haven't yet materialized.

For decades, a tacit global agreement existed: the U.S. buys the world's goods and provides security, and in return, the world finances U.S. debt by buying Treasuries. As U.S. policy shifts towards protectionism and reduced global policing, other nations may no longer feel obligated to fund U.S. deficits, pushing borrowing costs higher.

The global shift away from centralized manufacturing (deglobalization) requires redundant investment in infrastructure like semiconductor fabs in multiple countries. Simultaneously, the AI revolution demands enormous capital for data centers and chips. This dual surge in investment demand is a powerful structural force pushing the neutral rate of interest higher.

A simple framework explains the structural shift to higher interest rates. Retiring Boomers spend savings (Demographics), governments borrow more (Debt), global capital flows fracture (Deglobalization), AI requires huge investment (Data Centers), and geopolitical tensions increase military spending (Defense). These factors collectively increase borrowing costs.

The combination of restrictive trade policy, locked-in fiscal spending, and a Federal Reserve prioritizing growth over inflation control creates a durable trend toward a weaker U.S. dollar. This environment also suggests longer-term bond yields will remain elevated.

A common question is "who will buy all the debt?" The answer is that money borrowed and spent by a company on a project becomes income and then savings for others. These new savings are then used to buy the debt, completing a self-funding circular flow.

The massive increase in government debt held privately has broken the monetary policy transmission mechanism. When the Fed raises rates, the private sector's interest income from Treasury holdings now rises significantly, creating a stimulus that counteracts the tightening effect on borrowing costs.