Samsung Electronics posted its best quarter since 2022 on Thursday, and the stock fell 2.4 percent. TSMC booked record revenue the same day. Chip stocks still sank 3 to 5 percent across the board, on a Financial Times report that OpenAI’s annualized revenue stood near $50 billion, short of the $70 billion figure circulating a month earlier.
Samsung’s preliminary Q3 results showed operating profit of 12.1 trillion won, up 31.8 percent year over year, on revenue of 86 trillion won, a quarterly record. Analysts had expected operating profit near 10 trillion won. High-end memory for AI servers drove the beat, and HBM4 revenue more than tripled quarter over quarter.
The stock fell anyway. It happened before: in July, Samsung posted a record 89.4 trillion won quarter and the shares dropped nearly 7 percent. When expectations run ahead of the numbers, even a blowout becomes a sell-the-news event.
TSMC, the world’s largest contract chipmaker, reported Q3 revenue of NT$1.49 trillion, about $46.7 billion, up 50 percent year over year and an all-time high. It beat the LSEG consensus of NT$1.46 trillion drawn from 19 analysts. September alone brought NT$511.86 billion, up 54.6 percent. The first nine months of 2026 totaled NT$3.89 trillion, up 41.1 percent from the same stretch of 2025.
Neither number stopped the selling.
One headline, a sector-wide drop
The FT reported that OpenAI told investors its annualized revenue was reaching about $50 billion toward the end of September, roughly $20 billion below the projection from a month earlier. OpenAI is the biggest customer in the AI chip value chain and the closest thing the sector has to a demand signal, so the gap reset expectations for everyone downstream.
The Philadelphia Semiconductor Index fell 3.7 percent, its worst day since Sept. 14. Intel dropped 5.3 percent, SanDisk 4.9 percent, Micron 4.8 percent, Broadcom 4.35 percent, SK hynix ADRs 4.35 percent, AMD 3.9 percent, TSMC ADRs 3 percent and Nvidia 2.9 percent. The Nasdaq 100 moved more than 10 percent below its record high, correction territory. AI-linked names sold off around the world, with equities on both sides of the Atlantic catching the same bid for de-risking.
| Name | Oct. 8 change | Note |
|---|---|---|
| SOX index | -3.7% | Worst day since Sept. 14 |
| Intel | -5.3% | Steepest drop of the day |
| Micron | -4.8% | Despite sold-out HBM |
| Broadcom | -4.35% | OpenAI custom-chip partner |
| AMD | -3.9% | CEO visit to Seoul same week |
| Nvidia | -2.9% | Up 0.5% in overnight trading |
| Samsung Electronics | -2.4% | Sell-the-news on record quarter |
Analysts called the gap an accounting difference rather than a demand signal. Annualized revenue multiplies a short period into a full-year run rate, so how OpenAI counts deferred revenue and enterprise contracts changes the number materially. The next hard data point is TSMC’s full Q3 earnings call on Oct. 15, which shows whether AI chip orders are actually converting into production.
Samsung’s mixed picture
Samsung’s quarter was strong but not clean. The company forecast record Q3 profit driven by the AI memory boom, yet its foundry business, the division that makes chips for other companies, continues to lose money and trails TSMC by a wide margin in advanced nodes. Memory strength is carrying the group while foundry losses drag on it.
AMD CEO Lisa Su visited Seoul this week and called Samsung and SK hynix key AI partners, voicing satisfaction with HBM4 performance. A Samsung foundry partnership is on the table, which would be a meaningful win for the loss-making division if it lands.
SK hynix, the other major HBM supplier, saw its ADRs fall 4.35 percent despite the sector’s strongest memory fundamentals in years. The disconnect between record fundamentals and falling prices has defined the sector for weeks.
What the sector is really arguing about
Underneath the daily moves, the market is repricing how fast AI spending translates into revenue. TSMC’s monthly filings are among the few hard data points showing whether infrastructure spending converts into chips built, shipped and billed, rather than guidance and capex plans. By that measure, demand for logic chips is not fading; revenue hit an all-time high in the same month the OpenAI report landed.
The counterweight is concentration. A small number of AI labs account for a large share of advanced chip demand, and any revision to their revenue outlook moves the whole chain. Investors learned this week that a single FT story can shave 3 to 5 percent off the sector even while two of its biggest companies post record results.
Company-level news did not slow down while stocks fell. GlobalFoundries announced a five-year agreement to manufacture silicon interposers for TSMC at its Malta, New York fab, creating the first US-based source for the components used in advanced chip packaging. Volume production is targeted to ramp in the first half of 2028, and GF shares rose about 4 percent in premarket trading on the news, one of the only bright spots in an otherwise grim tape.
ASML and optics partner Carl Zeiss also published a peer-reviewed paper describing Hyper NA, a successor to High NA EUV lithography that could print features as small as 5nm roughly a decade from now. ASML has begun developing the machine but has not committed to producing it. The roadmap matters because it extends the runway for optical lithography, the core of ASML’s monopoly, into the mid-2030s.
The calendar gives the market a chance to reset. ASML reports earnings Oct. 14, TSMC’s full call comes Oct. 15, and Samsung’s detailed results follow. Until then, chip stocks will trade on AI revenue narratives rather than the fundamentals they just printed, which is not a comfortable place for a sector that just delivered its best quarter on record.