TSMC Jumped 6% on a Report It Could Make Memory Chips for Nvidia

TSMC's U.S.-listed shares rose 6.26% on November 6, 2026, on a report that it has begun drawing up plans to make memory chips for its largest customer, Nvidia. The rebound came just one day after the ADR dropped 10.78% to $353.10, and it still left the stock down 7.61% for the week.

The report, citing two people with direct knowledge of the matter, says TSMC recently started planning production of vertically stacked DRAM at Nvidia's request. Neither company has confirmed it. TSMC says it does not comment on market speculation.

The move matters beyond one ticker. The memory market sits at the center of the AI buildout, and a decision by the world's dominant foundry to enter it would reshape supply for years. For now, it's a planning exercise — and the market is trading on the possibility, not the product.

What did the report actually say?

TSMC is reportedly deciding between two paths: build new fabrication plants from scratch, or buy and retool an existing site. The second option has a precedent. Micron paid $1.8 billion for a Powerchip fab in Taiwan in March, a deal that gave it capacity fast.

The effort is reportedly led by Hsu Kuo-chin, a TSMC vice president who runs advanced packaging and previously ran Micron's regional operations. His background spans both sides of the divide — foundry logic and commodity memory — which fits the unusual nature of the project.

One technical distinction matters here. Vertically stacked DRAM places memory cells on top of one another within a single chip. High-bandwidth memory, or HBM, is a different product that stacks whole memory chips. TSMC holds patents on the vertical approach, according to the report.

Nothing has been signed or announced. TSMC has not said how much it might invest or when production could begin. Its 2026 capital budget already runs $60 billion to $64 billion, and a memory fab would add to that figure. Management did not discuss making memory on its October 15 earnings call.

How did the rest of the chip group react?

The whole sector bounced with TSMC. The VanEck Semiconductor ETF (NASDAQ:SMH) rose 3.52%. Nvidia gained 2.78% to $186.64. Micron added 5.12%.

TSMC's ADR outpaced all of them. It topped out at a 7.7% gain early in the session before settling at 6.26%. Taiwan's market had already closed by the time the report came out, so the local listing had no chance to react.

The gains only repaired part of the damage. TSMC finished the week down 7.61%, and Micron's 5.12% gain on Friday did little against its 22.01% weekly loss from the earlier selloff. Even after the rebound, TSMC's ADR is down 20.54% over one month.

What does Nvidia stand to gain?

Nvidia has a clear reason to want another memory supplier. Its supply obligations reached $279.0 billion, mostly for the memory that goes into Vera Rubin. Prices are biting. Nvidia's CFO said: "The magnitude of the price increase has exceeded our prior expectations."

A second supplier would give Nvidia leverage over the memory makers that currently hold the pricing power. But the timeline is long. No new supply would arrive in time to affect results for years, according to the report.

Micron, for its part, showed no sign of damage from the news. Its shares rose on Friday, and the company forecasts $61.5 billion in quarterly revenue. It is already co-designing HBM4E with Nvidia, a collaboration that keeps it close to the biggest buyer in the market.

Why are patents far from production?

TSMC holds patents on vertical DRAM. The hard part is the part after the patents: mass production with almost no defects, at scale, in a market TSMC has never served.

Three companies dominate memory today — Samsung, SK hynix and Micron — and the business swings between booms and busts. Memory has also historically made thinner margins than leading-edge logic. TSMC posted a 66.4% gross margin last quarter, a number memory manufacturing would struggle to match.

Building capacity takes time regardless of strategy. Micron expects first wafers from its new Idaho fab in mid-calendar 2027, and says meaningful supply growth will take a few more quarters after that. Any TSMC effort would face a similar clock.

How does TSMC's logic business shape the outlook?

The logic business remains the core of the investment case, with or without memory. TSMC forecasts fourth-quarter revenue of $52.3 billion to $54.3 billion, up from $46.72 billion in the prior quarter. It expects full-year 2026 growth of about 44%.

The memory report is a long-term possibility that isn't priced into those numbers. The market math is telling: the ADR is down 20.54% over one month even after Friday's rebound, which means the selloff did more to lower the price than the report did to lift it.

What happens next?

Two dates will test whether the rebound holds. TSMC reports October sales on November 10. Nvidia is expected to report earnings on November 17.

The technical line in the sand is simple. If the ADR falls back below $353.10 — its November 5 close — Friday's entire gain from the report will be gone. Until TSMC confirms a memory push, investors are trading a plan that two unnamed sources described, against a company that officially has nothing to say.