Institutions Warn: 10-Year Treasury Yield Breaking 5% Could Burst the AI Bubble
nashnova research
Rockefeller International chairman Ruchir Sharma warns that a decisive break above 5% on the 10-year Treasury yield could burst the AI bubble — the yield already sits at roughly 4.8%, one step from that threshold.
How bad is U.S. debt right now?
Federal debt has topped $40 trillion. Interest costs this fiscal year hit $1.17 trillion.
Public-debt interest now exceeds 3% of GDP — an all-time U.S. record and the highest among major developed economies.
This means → the government is spending so much just servicing debt that less and less room remains for every other borrower.
How is this bubble different from past ones?
Historically, every major bubble followed the same script: companies borrowed aggressively, pushed rates higher, and eventually popped — then government stepped in to absorb the debt.
This time the sequence is reversed: the government itself kept stimulating even while the economy was fine. Fiscal deficits ran at roughly 6% of GDP through the 2020s — more than double the prior multi-decade average.
In plain terms = in past cycles, corporates cracked first. This time the biggest borrower has been the government from the start.
Big Tech only began borrowing heavily for AI infrastructure in the past year, and leverage remains manageable relative to their scale.
Why is 5% the make-or-break line for AI?
AI applications currently generate an estimated $200 billion a year in revenue — a fraction of the $1 trillion-plus being spent on data centers and infrastructure. The gap depends heavily on external financing.
Once the 10-year yield crosses 5%, the inflation-adjusted return tops 2.5%. Many AI companies would be forced to compete with government bonds for capital — and a large number would simply be priced out of the debt market.
This means → Treasuries become a "risk-free, high-return" option. Investors have little reason to lend to cash-burning AI firms when the government offers comparable yields with zero credit risk.
What does a yield spike mean for equities?
If the 10-year yield breaches 5% within six months, the move would exceed 75 basis points — historically, surges of that magnitude have ended bull markets.
A 5% yield would also exceed the current S&P 500 earnings yield — a level that has historically created headwinds for stocks.
This reflects a core tension: the market is currently priced as though AI investment is immune to macro rates. Once rates arrive at that level, the assumption breaks.
Does the "back to the '90s" argument hold up?
Some analysts argue that breaching 5% simply returns to the 1990s, when the 10-year yield stayed above 5% and stocks still rallied.
Sharma pushes back: that decade ended with a fiscal surplus. Today, public debt is near 100% of GDP and servicing costs are far higher.
Put simply = in the '90s the U.S. carried little debt, so it could absorb high rates. Today it carries a mountain of debt — the same rates hit far harder.
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