SPDR Gold Shares (GLD), a gold-backed exchange-traded fund, closed October at $355.78, down 6.58% from $380.84 at the end of September, by our arithmetic from Yahoo Finance closing prices. That is the fund’s weakest October since 2008, when it fell 16.14%.
Barchart flagged the move in a post on X on 2 November, writing that gold “suffered its worst October since 2008”. Our check of every October in Yahoo Finance’s monthly data for the fund, which starts with 2005, matches that claim.
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Animated: SPDR Gold Shares (GLD) daily closes, 25 September to 30 October 2026, from Yahoo Finance price data.
The key insight: SPDR Gold Shares closed October at $355.78, down 6.58% from $380.84, its weakest October since 2008, by our arithmetic from Yahoo Finance closes; in the same month our count of 30 AI-exposed stocks lost $3.17 trillion and the 10-year real yield fell from 2.93% to 2.63%.
The fund peaked at $393.41 on 25 September and finished October at its lowest close of the period, $355.78 on 30 October. By our arithmetic, that is about 9.6% below the September peak.
Gold futures moved in the same direction. The front-month COMEX contract closed at $4,186.70 on 30 September and $3,898.90 on 30 October, a fall of about 6.9% by our arithmetic.
Change in the SPDR Gold Shares (GLD) price in October of each year, 2005 to 2026. Our arithmetic from Yahoo Finance closes: $380.84 on 30 September 2026 to $355.78 on 30 October 2026 (-6.58%); earlier years from month-end closes. Chart: FourWeekMBA.
Every October Since 2005
Of the 21 Octobers from 2005 to 2025, the fund fell in nine. Apart from 2008, the deepest of those declines was 3.05% in 2014, by our arithmetic from month-end closes. October 2026 more than doubled that.
The previous three Octobers were all gains: 7.37% in 2023, 4.30% in 2024 and 3.56% in 2025. The best October in the series was 2023; the worst remains 2008, when the fund went from $85.07 at the end of September to $71.34 at the end of October.
Treasury yields fell too, which means bond prices rose. Federal Reserve data show the 10-year Treasury yield at 5.29% on 30 September and 4.98% on 29 October, and the 10-year inflation-protected real yield at 2.93% and 2.63% on the same dates.
As we read it, the moves happened in the same month: real yields fell, a move often linked with firmer gold, yet gold dropped alongside AI stocks. The data do not show why.
How We Measured It
We compared each year’s last September close with its last October close for the fund, using Yahoo Finance price data. For 2026 we used daily closes: 30 September and 30 October, the last trading day of the month.
The futures figures use the same two dates for the front-month COMEX contract. The AI-stock figure comes from our 1 November count, built from closing prices and the share counts in company filings.
The Structural Read
By our arithmetic, apart from 2008, no October since 2005 fell more than 3.05%.
In the same month, our count of 30 AI-exposed stocks fell about 8.5% and the 10-year Treasury yield fell from 5.29% to 4.98%.
The price and yield series show when the moves happened; they do not explain why gold fell.
Barchart on X, 2 November 2026
“Gold $GLD suffered its worst October since 2008”
Three Implications
FOR GOLD HOLDERS The fund ended October at $355.78, its lowest close of the period, about 9.6% below the 25 September peak of $393.41, by our arithmetic.
FOR AI INVESTORS The same month, our count of 30 AI-exposed stocks lost $3.17 trillion, about 8.5%.
FOR RATE WATCHERS Federal Reserve data show the 10-year Treasury yield at 5.29% on 30 September and 4.98% on 29 October.
The framework puts it this way: “It is a sovereign-scale financing problem dressed in tech-company clothing — and the financial architecture is starting to invert.”
The framework does not discuss gold, and this piece draws no link between the framework and gold’s October fall.
Our figures track the GLD fund and front-month futures, not the London spot benchmark. We do not attribute the fall to any single cause, and the bond figures end on 29 October, the latest Federal Reserve data we read.
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SPDR Gold Shares lost 6.58% in October, its worst October since 2008, in the same month that 30 AI stocks shed $3.17 trillion and real yields fell 30 basis points.
A note on sourcing. Price changes are our arithmetic from Yahoo Finance closing prices for SPDR Gold Shares (GLD) and front-month COMEX gold futures; yields are from the Federal Reserve Bank of St. Louis (FRED). The prompt was a 2 November post on X by Barchart.
Gennaro Cuofano is a CRO and tech executive who has worked in AI since late 2015, starting with bringing NLP, natural-language generation, voice and chatbot products to the marketing industry. His background is in law and finance: he holds a Master's degree in Law and an International MBA with an emphasis on corporate finance (LUISS Business School and the University of San Diego, 2012), and worked as a financial analyst at a real-estate investment firm in San Diego and as an assistant controller. His work focuses on business model strategy, business engineering and, more broadly, structural analysis: how companies make money, read from their own filings. He created FourWeekMBA and leads research there and at The Business Engineer, his newsletter on AI and business strategy, with over 95,000 subscribers and more than 1,000 published analyses. His writing has also appeared on Entrepreneur (for example, How to Digitize a Family Business in Europe) and HackerNoon. Find him on LinkedIn and Substack. See how we source.
