The AI build-out increases real interest rates by demanding vast amounts of capital, crowding out other investments. Simultaneously, it pushes up nominal rates by creating inflationary pressure on physical resources like labor, energy, and materials needed for data centers.
The primary buyer of US Treasuries has shifted from foreign central banks to more volatile investors like hedge funds and non-bank financial institutions. This change in the investor base is a key structural reason for the increased sensitivity and volatility in bond yields.
The era of a global savings glut, which pushed interest rates down, is over. The world now faces capital scarcity, evidenced by rising real interest rates. This shift is driven by massive demand from the AI boom, persistent fiscal deficits, and reshoring initiatives.
The ability of Western governments to manage their enormous public debt levels is now implicitly dependent on the hope that AI will generate a massive, sustained productivity boom. If AI fails to deliver this unprecedented growth, a widespread fiscal crisis becomes a serious risk.
Unlike emerging markets, a debt crisis in a country that prints its own currency (like the U.S. or U.K.) would not be a currency collapse. Instead, it would appear as a severe credit crunch and financial crisis, with soaring borrowing costs causing a slump in investment and economic dynamism.
Investors are operating under a "Bliss" (Big, Lasting State Support) assumption, expecting governments to backstop any crisis. However, with record-high debt, governments lack the fiscal space for another major intervention, making future crises more severe and potentially leading to unorthodox policies like price controls.
Foreign holdings of US equities are at a historic high, double their share of global GDP compared to the peak of the 2000 dot-com bubble. This extreme concentration, largely driven by the AI trade, makes the global financial system uniquely vulnerable to a downturn in the US stock market.
China's large trade surplus is a symptom of internal economic weakness—primarily suppressed consumption and collapsing investment from its property market crisis. This challenges the narrative of unstoppable manufacturing prowess and suggests the surplus is not sustainable as trade partners react.