October delivered one of those months where the headline number lied. Astoria Investment Management's latest commentary, "Equal Weight Leads as AI Funding Faces a Test"1, lays out a market that broadened even as its most-watched benchmark cracked.
The Nasdaq-100 fell 6.7%, its worst month since March 2025. The S&P 500 limped to a 0.9% decline. But the S&P 500 Equal Weight Index rose 4.9%, beating its cap-weighted cousin by nearly six points — its widest monthly margin since 2009. Value stocks led at 4.9%, small-caps added 3.2%, mid-caps gained 1.9%. Emerging markets and US growth both lagged, down 6.4% and 5.4% respectively. Bonds firmed, crude oil jumped 15.9%, and both silver and gold fell sharply. The team's framing is plain enough: mega-cap tech slid while everything underneath it held up. That is not a small distinction for anyone still running concentrated index exposure.
Warsh Trims the Calendar, Keeps the Rate
The Fed held the federal funds rate at 3.75–4.00% in a 10–2 vote, with Governor Lisa Cook and Cleveland Fed President Beth Hammack dissenting in favor of a hike. September CPI rose 0.6% month-over-month, pushing headline inflation to 3.7% year-over-year, and the policy statement upgraded its description of the economy from "solid" to "strong." Starting in 2027, one of the eight annual FOMC meetings will be reserved for long-run strategy, with no rate vote attached — fewer decision points, and as the team notes, each remaining meeting now carries more weight. Markets are pricing roughly 83% odds of a December hike.
Growth, Not Inflation, Is Behind the 5% Yield
The 10-year Treasury yield is sitting near 5%. Astoria's historical read is reassuring: since 1990, every time the 10-year has traded above that level, the S&P 500 has averaged a 5.3% forward return over six months and 11.1% over twelve. Third-quarter GDP grew at a 3.4% annualized pace, ahead of the 3.2% consensus, while the 10-year breakeven inflation rate has stayed in a tight 2.2–2.4% band since 2023. The team's conclusion: this is a yield shaped by real growth, not a market bracing for inflation to run away.
AI Demand Holds, but Who's Paying Is the New Question
The debate has moved on from whether AI capex is justified to how it gets financed. Demand remains strong, full stop — Anthropic's S-1 disclosed roughly $417 billion in future compute obligations, Azure revenue grew 48%, and Google Cloud revenue more than doubled. But the funding picture is splitting the hyperscalers apart. Meta's capex outran its operating cash flow, forcing it into stock offerings and new debt. Microsoft generated $18.6 billion of free cash flow and is still returning to the bond market for at least $25 billion. Alphabet posted its second straight negative free-cash-flow quarter at -$9.1 billion, and its shares fell nearly 13%. Five-year CDS spreads have widened since summer, concentrated in leveraged neoclouds — CoreWeave shares dropped more than a third in October alone.
Volatility Rises, but the Plumbing Holds
An October 30 one-two punch — weak results and cash-burn warnings from Amazon and Intel — sent the S&P 500 down 1.8% and the Nasdaq Composite down 2.9% in a single session, with the VIX spiking 12.9% to 19.4. Since its October 6 record, the Nasdaq-100 has fallen roughly 9% while the Equal Weight Index has added nearly 3%. The team attributes the tightening to higher rates, a Fed balance sheet whose three-month growth has fallen from roughly 2% to near zero, rising capital demand, and higher energy prices. Crucially, the strain has not spread to short-term funding markets, and the Fed and Treasury retain tools to intervene if that changes.
Five Takeaways for Advisors and Investors
- Breadth, not just the index level, is now the signal worth watching — equal weight's historic margin over cap weight says concentration risk is being repriced.
- A 5% 10-year yield, backed by above-consensus GDP growth and anchored breakevens, has historically preceded solid forward equity returns.
- AI demand itself isn't the risk; balance-sheet stress at the capital-intensive neoclouds and leveraged builders is.
- Fed balance-sheet growth slowing toward zero is a quieter tightening channel than rate policy, and it deserves equal attention.
- Short-term funding markets remain calm — the stress is concentrated, not systemic, for now.
Footnote:
1 Astoria Investment Management. "Equal Weight Leads as AI Funding Faces a Test: Can the Broadening Hold as Conditions Tighten?" Astoria Advisors, 2 Nov. 2026, www.astoriaadvisors.com/single-post/equal-weight-leads-as-ai-funding-faces-a-test-can-the-broadening-hold-as-conditions-tighten.
