BofA Hartnett: AI Capex and Bond Pressure Create Unresolvable Tension, Tech Stock Relief Window May Not Open Until H1 2027
nashnova research
BofA strategist Michael Hartnett warns that AI hyperscaler capex is surging from $240 billion to an estimated $1.2 trillion by 2027, turning the bond market into a brake on the tech bull run — the real relief window likely won't open until H1 2027.
Where is the AI money coming from — and going?
Hyperscalers — the Microsofts, Amazons, and Googles building AI infrastructure at scale — issued $182 billion in debt in 2026, up from just $17 billion in 2024. That is a tenfold-plus jump in two years.
Capex is set to soar from $240 billion in 2024 to an estimated $1.2 trillion by 2027. Free cash flow over the same span is projected to swing from positive $240 billion to negative $180 billion.
This means → these companies are spending far faster than they earn, and debt markets are filling the gap. In plain terms = the bill for the AI arms race is being charged to the bond market.
What is the cost of debt-funded AI buildout?
The most visible cost: share buybacks collapsed from $105 billion in 2024 to an annualized ~$14 billion in 2026 — a drop of more than 90%.
This means → one of the key engines that lifted tech stocks for years — companies buying back their own shares — has nearly shut down. The cash is going to data centers instead.
The bond-supply shock already shows in the data: U.S. investment-grade tech debt total return relative to the broader IG index has fallen to a 30-year low.
Why do "avoid bonds" and "buy AI" fight each other?
BofA frames the current market around four super-trends. The core clash is between ABB (Anything but Bonds) and AI. Political populism worldwide keeps government spending elevated, so allocators remain structurally underweight bonds.
Yet the higher bond yields ABB produces are exactly what constrains AI stocks — because AI companies are now among the bond market's biggest borrowers.
In plain terms = the market simultaneously shuns bonds (pushing yields up) and loves AI, but AI companies need low yields to borrow cheaply. The two convictions contradict each other.
When does the pressure valve open?
Hartnett argues bond yields need two preconditions to fall meaningfully: a geopolitical thaw that drives oil prices sharply lower + the end of the global rate-hiking cycle. Over the past six months, central banks worldwide have hiked rates a cumulative 42 times — far from finished.
BofA points the relief window to H1 2027 and recommends shorting oil at that point.
A key caveat: if oil falls but the euro and yen fail to rally, this signals that Chinese deflation has become a new global drag — and the relief thesis itself would break down.
Could tech debt be the overlooked opportunity?
BofA calls tech bonds an "overlooked valley of value." Long-dated investment-grade debt from Meta, Amazon, Google, and Nvidia yields 6%–8%; select high-yield issues reach 9%–14%.
This means → while the equity side of these same companies is under pressure, the bond side — flooded with supply — is offering unusually high returns. BofA suggests investors watch this relative-value window.
What does this week's fund-flow data signal?
China equities drew $25.7 billion in a single week, the largest inflow since April 2025. Japan equities pulled in $6.8 billion, the biggest weekly inflow since May 2013.
Gold saw $1.7 billion in net outflows — the first since July 2026. TIPS drew $1.1 billion, the largest inflow since June 2026, signaling rising inflation expectations.
Year-to-date cross-asset scoreboard: commodities up 91.6%, U.S. equities up 14%, government bonds down 3.3%, gold down 7.1%. This reflects the "shun bonds, embrace real assets" super-trend still running strong.
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