In opening trade on 12 November, Samsung Electronics gained about $11.0 billion of market value; SK hynix lost about $2.2 billion of market value, by our arithmetic on exchange quotes carried by Yahoo Finance, after Nvidia shares fell in after-hours trading in New York. Two of the five Asian AI supply-chain stocks we track that were trading when we checked were below their 11 November closes; the median opening move of those five was +1.21%, against Nvidia’s -7.94% after-hours move.
Nvidia traded at $159.93 at 00:20 UTC in after-hours trading, 7.9% below its $173.73 regular-session close of 11 November: about $333 billion of market value on the 24.1 billion shares on its latest 10-Q cover, by our arithmetic. Asian prices were checked at 00:20 UTC, minutes into the session, and are opening moves, not closes.
Business Pill · Concentration Explained
An evergreen Business Engineer explainer on market concentration. It teaches the general idea only and does not discuss today’s market moves.
The key insight: In opening trade on 12 November, two of the 5 Asian AI supply-chain stocks we track were below their 11 November closes, with a median move of +1.21% against Nvidia’s -7.94% after-hours move, by our arithmetic on exchange quotes. These are opening moves, not closes.
Update, 12 November, 02:46 UTC: Seoul intraday. On Naver Finance’s real-time Korea Exchange quotes at 02:46 UTC (11:46 in Seoul), Samsung Electronics traded at ₩212,000, +2.91% on its 11 November close, after a session high of ₩214,000 (+3.88%, by our arithmetic); SK hynix traded at ₩1,294,000, +1.33%, after touching ₩1,310,000. The KOSPI was +0.88%. On the share counts in the market value section below, that put Samsung about $26.3 billion and SK hynix about $9.3 billion above their 11 November closing values, a combined $35.6 billion, by our arithmetic at ₩1,334.95 to the dollar. On Yahoo Finance quotes timed 02:26 to 02:30 UTC, five of the nine stocks in our basket were above their 11 November closes and the median move was +0.62%, by our arithmetic. Nvidia’s last after-hours trade on Yahoo Finance’s chart, at 01:00 UTC, was $158.78, 8.6% below its $173.73 regular-session close of 11 November, by our arithmetic. These are intraday moves, not closes.
Update, 12 November, 01:30 UTC: Taipei open. Against their 11 November closes, on exchange quotes carried by Yahoo Finance: TSMC -1.25% (NT$2,365 at 01:10 UTC); Hon Hai -0.83% (NT$240 at 01:10 UTC); Quanta -2.85% (NT$289.5 at 01:10 UTC); Wiwynn +0.60% (NT$1,690 at 01:10 UTC). The Taiex was -0.43%. On the issued common shares in the Taiwan Stock Exchange’s listed-company data dated 11 November 2026, the four were worth a combined $25.4 billion less than at the 11 November close, by our arithmetic at NT$32.87 to the dollar: TSMC -$23.7 billion; Hon Hai -$0.9 billion; Quanta -$1.1 billion; Wiwynn +$0.2 billion. With Taipei trading, five of the nine stocks in our basket were below their 11 November closes at the 01:30 UTC check, and the median move of the nine was -0.63%, by our arithmetic (quotes timed 01:10 to 01:15 UTC). These are early-session moves, not closes.
Seoul: SK hynix -0.31% (₩1,273,000 at 00:00 UTC); Samsung Electronics +1.21% (₩208,500 at 00:00 UTC). The KOSPI was +0.26%. Yonhap reported that South Korean shares started higher tracking overnight gains on Wall Street, where the S&P 500 gained 1.31% and the Nasdaq Composite 1.6% in the regular session, and that strong CoreWeave earnings eased investor concerns over the profitability of AI investment.
Tokyo: Advantest -2.23% (¥30,740 at 00:05 UTC); Tokyo Electron +1.69% (¥9,429 at 00:05 UTC); SoftBank Group +2.83% (¥3,964 at 00:05 UTC). The Nikkei 225 was +0.65%.
Taipei: the Taiwan Stock Exchange opened at 01:00 UTC, after our first check; TSMC, Hon Hai, Quanta and Wiwynn are in the Taipei open update above. They are not in the counts, median or market value figures in this section.
Each change is against that stock’s 11 November close. The weakest opening move in the basket was Advantest -2.23% (¥30,740 at 00:05 UTC); the strongest was SoftBank Group +2.83% (¥3,964 at 00:05 UTC).
Nine Asian AI supply-chain stocks: change on the 11 November session and opening move on 12 November against the 11 November close, from exchange quotes via Yahoo Finance. Opening moves, not closes; the basket and its median are our arithmetic.
The Market Value Arithmetic
On exchange-listed share counts, the two Seoul names in the basket were worth a combined $8.8 billion more at the opening quotes than at the 11 November close, by our arithmetic: SK hynix -$2.2 billion; Samsung Electronics +$11.0 billion. Local-currency amounts are converted at the exchange rates Yahoo Finance showed at 00:20 UTC.
Share counts are the listed common shares implied by Korea Exchange market value on Naver Finance. Samsung’s figure covers common shares only. We did not compute Tokyo market values.
One Session Earlier
On 11 November, the session after Nvidia’s 10 November fall, eight of 10 Asian AI stocks we tracked rose, with a median move of +3.79%. The five names in today’s count closed 11 November with 4 of 5 higher and a median change of +3.57%, by our arithmetic on the same quotes. Today’s basket of nine adds Hon Hai, Quanta and Wiwynn, the Taipei-listed server makers, and drops Fujikura, Kioxia, Alibaba and SMIC.
The after-hours move followed a Wall Street Journal report on board deliberations about Nvidia’s leadership, which we reported; how such a decision works under Nvidia’s bylaws is in our explainer. We state the timing of the price moves only.
The Structural Read
As we read it, the opening quotes put a size on how far Nvidia’s after-hours move carried into the Asian names that make its memory, chips, test equipment and servers in the first minutes of trading; they do not show why the prices moved.
FourWeekMBA, Nvidia after-hours report, 11 Nov 2026
“Nvidia shares traded at $161.04 at 22:40 UTC in after-hours trading, 7.3% below the $173.73 regular-session close”
Three Implications
FOR THE LARGEST NAMES Samsung Electronics and SK hynix together had a net $8.8 billion more market value at the opening quotes than at the 11 November close, by our arithmetic.
FOR THE ONE-SESSION COMPARISON On 11 November the same five names closed with 4 of 5 higher and a median change of +3.57%, by our arithmetic on the same quotes.
FOR READERS OF OPENING DATA Opening quotes can change sharply through a session and can be delayed by the data provider.
What Is Not Established
Yonhap attributed Seoul’s higher start to overnight gains on Wall Street; we did not find an outlet market report attributing the Tokyo opening moves to a cause, so for Tokyo this piece states the moves and their timing only. Opening quotes can change sharply through a session; the basket is our selection of nine AI supply-chain names, and a different basket would give a different median. Quotes from the data provider can be delayed, so a quote time can trail the trade it reflects.
This Week In The AI Supercycle
The Great Convergence of Capital, Power, and Geopolitics
This week’s issue: for two years the AI build-out was priced as a supply story, and last week as a credit story. This week it was priced as a permission story, and the answer arrived as a cost, not a ban.
In opening trade on 12 November, two of the five Asian AI supply-chain stocks we track that were trading when we checked were below their 11 November closes, with a median move of +1.21% against Nvidia’s -7.94% after-hours move, by our arithmetic on exchange quotes.
A note on sourcing. Prices are exchange quotes carried by Yahoo Finance, checked on 12 November 2026 at the time stated, minutes after each market opened; quotes can be delayed and opening moves can change by the close. Share counts are Taiwan Stock Exchange listed-company data and Korea Exchange market value read on Naver Finance. Percentage changes, market value changes, the basket and its median are our arithmetic. We did not contact the companies.
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.
