Private Sector Replaces Central Banks: The Evolving Support Structure Beneath the Dollar
Nashnova编辑部
The anchor of offshore dollar demand is shifting from central banks to the private sector — foreign private holders now account for 83% of U.S. long-term securities, up from 67%. This means → the dollar's floor no longer rests on official reserves but on global firms and funds choosing to park capital in American assets.
"De-dollarization" has been the talk for years — why hasn't the dollar fallen?
Central banks' share of dollar reserves has indeed declined steadily, yet the dollar index has diverged sharply from that trend in recent years — less official buying, but no weakening.
This reflects a change of hands: foreign official holders of U.S. long-term securities dropped from about 33% in 2008 to roughly 17% today, while private-sector holdings rose from 67% to 83%.
In plain terms = whether the dollar stays strong used to depend on central banks buying Treasuries. Now it depends on whether global companies and funds keep pouring money into U.S. assets.
How did the AI supply chain become the dollar's "invisible pump"?
Since 2020, the widening U.S. trade deficit has been driven largely by AI data-center construction and compute-chip procurement — massive capital expenditure that creates rigid dollar demand among overseas tech firms.
This means → dollars flowing out via the trade deficit are not being sold on the FX market. Instead they follow an "external loop": out of the U.S. → parked in offshore corporate accounts → reinvested back into the U.S. tech ecosystem.
In plain terms = a trade deficit should weaken the dollar, but this money circles back almost immediately — the usual FX pressure is effectively short-circuited.
What does the Korea-vs-China contrast tell us?
South Korea is a semiconductor-boom beneficiary, yet the won has been persistently weak since last year. The core reason: Samsung Electronics and SK Hynix retain dollar revenues in offshore accounts for overseas expansion. Korean corporate foreign-currency deposits reached $113.3 billion by June 2026.
This means → earning dollars but not converting them home leaves won selling pressure stranded in the market.
China shows the opposite pattern: corporate willingness to convert dollars has rebounded sharply. The six-month moving-average settlement ratio for goods trade touched a near-ten-year high, and monthly net FX settlement has stayed above RMB 200 billion since early 2026.
In plain terms = both countries earn dollars, but Korean firms choose to "keep and spend" while Chinese firms choose to "bring it home" — and that behavioral split is pulling the two currencies in opposite directions.
How does the carry trade make this loop self-reinforcing?
With high rates and an AI-driven equity premium, dollar assets deliver both yield and capital gains. That double payoff draws offshore institutions to borrow in yen or Swiss francs and swap into dollars.
The mechanism becomes a self-reinforcing spiral: high returns attract leveraged inflows → the dollar strengthens and asset valuations rise → still more carry capital enters.
BIS data shows banks' yen claims on non-bank entities outside Japan have climbed to roughly $270 billion — This reflects deep participation by cross-border leveraged capital in this feedback loop.
Where is the biggest risk in this new system?
The current dollar framework is a tug-of-war between two forces: fiscal expansion swelling Treasury supply plus official-sector selling push up term premia and pull the dollar down; the AI boom's earnings and valuation tailwind keeps attracting private capital and props the dollar up.
The key fragility: private-sector allocation is intensely pro-cyclical. In an upswing, leverage amplifies dollar-system tension. If risk appetite reverses, carry unwinds and asset sell-offs can resonate simultaneously.
In plain terms = central banks are a "buy-into-the-storm" stabilizer; private capital is a "chase-the-rally, dump-the-dip" amplifier. The dollar's foundation has switched to the latter — rallies run harder, but a reversal could hit far harder than anything seen in the official-reserve era. Whether dollar resilience holds ultimately depends on whether AI momentum and U.S. equity valuations can keep justifying private capital's dollar preference.
Content is for reference only, not financial advice.