Goldman warns: a December hike remains the base case but markets "aren't ready" — and the AI-selloff-driven Treasury rally is fragile and reversible

The Treasury market's whiplash isn't over: after the 10-year yield's 17-basis-point crash on Thursday (the biggest single-day drop since March 2023) back below 5%, Goldman's new report warns — "whether the Fed hikes in December or not, markets may not be ready." Strategist Cosimo Codacci-Pisanelli notes that what drove yields lower was precisely the haven bid from the AI equity selloff, yet Goldman still treats a December hike as the base case and doubts the market can easily reprice a full 25 basis points^[1].

Three forces behind the yield drop — and its fragility

Goldman attributes the recent Treasury rally to three forces: high rates beginning to crush AI-linked assets; a rising tail risk of AI-driven growth slowing sharply; and a shift in the stock-bond correlation — long-duration Treasuries are again hedging equity risk (in contrast to earlier this month, when hot inflation data saw stocks and bonds fall together). But the report lists the rally's fragilities too: the Treasury-supply pressure from AI capex and debt financing remains — Goldman projects about $1.6 trillion of AI capital spending in 2027 with a rising debt-financed share; "AI equity outflows can support Treasuries temporarily, but sustained buying still requires a broader equity decline or further deterioration in growth expectations"^[1].

December's pricing paradox: 90% odds, yet "not ready"

Market pricing is contorted: as of October 23, markets priced about 90% odds of a December hike and roughly 2.7 cumulative hikes by September 2027 — the hike is substantially in the price. Goldman's warning targets exactly the quality of that pricing: inflation justifies a hike, but Chair Warsh has refused to give explicit guidance on the path ahead, and markets have drifted toward the Fed holding in October and deferring to December; if December actually lands, the further shock to risk assets and the deterioration in financial conditions must be absorbed simultaneously — that is precisely what "not ready" means: the market has priced the event, but not its chain reactions^[1]. Goldman's summary: the interplay of AI growth prospects, energy shocks and bond supply-demand is shifting, and markets must guard against both worsening growth expectations and the tightening risk of sticky inflation — two-way risk management, not a one-way bet^[1].

The double meaning for gold and the AI trade

The report's implications for two assets are direct. For gold: if a December hike lands with hawkish Warsh language, real-rate expectations rise again and gold's "capitulation selloff" may have a second act; conversely, a dovish October statement would hand gold its first decent rebound window in weeks. For the AI trade: the stock-bond correlation has inverted (bonds are again equity hedges), meaning every AI stock decline now self-reinforces into Treasury gains, which through FX and financial conditions push back on risk assets — if last week's "AI down, bonds up" combination persists, volatility will converge more slowly than prices. Next week's Fed decision is therefore not just a rates event but the first formal test of this correlation regime^[1].

What to watch

First, the October 29 statement's language on inflation and the balance sheet. Second, any explicit December guidance from Warsh's presser — "explicit" is itself a market variable. Third, Treasury auction demand — the real-time read on supply pressure. Fourth, whether the negative stock-Treasury correlation survives the next selloff day^[1].

Replaying last week's Treasury rollercoaster: three days, three narratives

Splitting last week's Treasury action day by day reveals how fast the market's narrative iterated. Early week: AI credit worries fermented, stocks and bonds fell together, and the 10-year pushed toward 5.3%. Midweek: Meta's spending-commitment disclosure detonated the selloff's acceleration, with yields printing new highs before retreating. Thursday: the AI equity crash triggered a haven rush into Treasuries — yields crashed 17 basis points in a day, the biggest drop since March 2023, back below 5%. Within three days, the market swung from "AI financing pressure lifts rates" to "AI-collapse fear lowers rates" — the two faces of the same AI narrative successively owning the price. Goldman's report is valuable for naming the unsustainability: a yield decline driven by asset selloffs is essentially a rehearsal of recession hedging, while the bond supply from AI capex (~$1.6 trillion in 2027, rising debt share) is still there — the narrative pendulum must eventually return to supply-demand fundamentals.