On the other hand, foreign investors may simply be onto something.
It sounds counterintuitive, but by some measures, today’s U.S. tech behemoths are just as "safe" an investment as Treasuries. Apple and Microsoft have a triple-A credit rating, unlike the U.S. government, and the two-year yield on some corporate debt, like Microsoft bonds, is sometimes lower than the two-year Treasury yield.
Moreover, some of the Big Tech firms are now so important to the U.S. government from an economic, strategic and national security standpoint that it's almost unthinkable that they would be allowed to fail.
It's not just private overseas sector capital that has been lured into Wall Street in recent years. Many central banks and sovereign wealth funds have increased exposures to trillion-dollar U.S. megacaps like Apple, Microsoft and Nvidia. In essence, they've swapped the safety and liquidity of Treasuries for what many now consider the safety, if not the liquidity, of Big Tech.
According to analysts at Deutsche Bank, the gap between increasing net flows into U.S. stocks and slowing flows into U.S. debt has never been wider.
"The U.S. fiscal position is weakening, while U.S. corporate profitability is going from strength to strength," they write, adding: "AI could accelerate these dynamics as companies get richer and the redistributive pressures on governments grow."
In fact, one unwelcome byproduct of the AI buildout may be a wider U.S. current account deficit. A Fed paper this month found that investment-specific technology shocks are associated with a "persistent current account deterioration of roughly 10% relative to its historical average." That is usually because imports surge as tech investment booms.
This phenomenon threatens to be even more pronounced in the current AI investment frenzy because around 90% of the relevant equipment is imported from East Asia, the authors note.
Fears about the U.S. current account are nothing new, of course. If a crisis does eventually materialize, it won't be out of the blue. It will come slowly over the horizon.
It’s also good to remember that despite decades of warnings from deficit hawks about the imminent collapse of the U.S. under its debt burdens, America is still the place to be for investors, and the dollar is still the undisputed global reserve currency.
But the size of the imbalance is getting hard to ignore. Another way to look at the flood of capital coming into America is the country’s net international investment position (NIIP). This is essentially all U.S. assets held by foreigners less all foreign assets held by Americans. This figure currently stands around $21 trillion, according to the Bureau of Economic Analysis, or around 70% of U.S. GDP. Twenty years ago, that was closer to 10% of U.S. GDP.
Big numbers, big flows, and maybe one day, a big problem.