Apple shares traded at $326.88 at 14:36 UTC on 3 November, 3.38% below the $338.32 close of 2 November, according to Nasdaq.com quote data, in the first regular session since Apple reported its fiscal fourth quarter. The regular session opened at 14:30 UTC.
By our arithmetic, a $11.44 fall on the 14,532,182,000 shares the 10-K says were outstanding on 23 October is about $166 billion of stock market value.
Business Pill ยท The Memory Wall
An evergreen Business Engineer explainer on memory as a constraint. It teaches the general idea only and does not discuss Apple’s share price or results.
The key insight: By our arithmetic, Apple’s $11.44 fall to $326.88 at 14:36 UTC on 3 November is about $166 billion of market value, about 76 times the $2.2 billion of December-quarter gross profit that the margin step Apple guided represents.
Before the open, Nasdaq.com showed Apple at $324.41 at 8:59 a.m. New York time, or 13:59 UTC, down 4.11% in pre-market trading. In Nasdaq.com’s minute data, the first regular-session reading was $329.94 at 14:30 UTC; the session low so far was $326.25 at 14:35 UTC and the high $329.94 at 14:30 UTC.
24/7 Wall St, in a report published at 13:49 UTC, said Apple had fallen 4% after beating fourth-quarter estimates, with chief executive John Ternus warning that memory pricing is “unprecedented” and the December-quarter gross margin guided to 45% to 46%. It put that range below a 46.3% analyst estimate.
Apple’s share price on 3 November 2026 by minute, pre-market and regular session, from Nasdaq.com quote data, against the 2 November close of $338.32. Times are UTC. Chart: FourWeekMBA.
What Apple Guided
CNBC reported that chief financial officer Kevan Parekh said gross margin would be between 45% and 46% in the December quarter, “lower than in the fourth quarter”. Apple reported a fourth-quarter gross margin of 47.9%, as we set out in our gross profit piece.
Apple put the September-quarter step down to memory. In our piece on the call, we set out Parekh’s words and the margin bridge: the 1.4-point step implied for December, mostly memory by Apple’s account, is about $2.2 billion of gross profit, by our arithmetic. By the same arithmetic, the market value lost at 14:36 UTC is about 76 times that $2.2 billion.
24/7 Wall St said Parekh pinned the decline “mostly on higher memory costs”, with Siri AI cloudexpenses and hardware revenue deferrals adding to the pressure.
The 10-K says Apple “expects these trends to intensify for memory and storage components”. Our guidance piece covers the 7% to 10% revenue range for the December quarter.
The Structural Read
As we read the results, the margin guide carried the memory story into the price: Apple reported a fourth-quarter gross margin of 47.9% and guided 45% to 46% for the December quarter, according to CNBC.
As we read the filings, the same costs show up in Apple’s balance of commitments: $117.0 billion of manufacturing and other purchase obligations at 26 September, which we covered separately.
Apple Form 10-K, fiscal 2026
“expects these trends to intensify for memory and storage components”
Three Implications
FOR SHAREHOLDERS By our arithmetic, the move on 14,532,182,000 shares is about $166 billion of market value at 14:36 UTC; the figure moves with the price.
FOR APPLE’S MARGIN CNBC reported a December-quarter gross margin guide of 45% to 46%, against 47.9% reported for the fourth quarter.
FOR THE MEMORY TRADE 24/7 Wall St said Microsoft and Meta, both buyers of AI infrastructure, were little changed while Apple fell, and tied the gap to memory chips.
The framework argues: “Memory is becoming the new compute”.
As we read it, Apple’s December-quarter margin guide is a consumer-hardware view of that constraint. The framework is the owner’s argument and does not discuss Apple’s results or share price.
The reasons for a share-price move are the market’s, not Apple’s; the explanations here are those 24/7 Wall St and CNBC gave. 24/7 Wall St also noted that Apple was down 6% over the past week and Alphabet 12%, which it said “cuts against a purely Apple-specific story”.
The price is a point in a moving session, and the market value figure moves with it. Apple does not report the gross margin effect of memory alone in its filings.
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Apple traded at $326.88 at 14:36 UTC, 3.38% below its 2 November close, a fall of about $166 billion in market value by our arithmetic. 24/7 Wall St tied the reaction to a December-quarter gross margin guide of 45% to 46%, which it said Parekh pinned mostly on higher memory costs.
A note on sourcing. Prices are from Nasdaq.com quote data read on 3 November 2026 at the times shown; shares outstanding are from Apple’s fiscal 2026 10-K cover page. Reasons for the move are as reported by 24/7 Wall St and CNBC. The market value change and multiples are our arithmetic. We did not contact Apple.
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.
