CXMT: China's DRAM Maker, Listed Where You Cannot Buy It

CXMT listed on Shanghai's STAR Market in July 2026 and closed up 466%. Foreign retail cannot buy STAR shares. What the company is, and what the perpetual tracks.

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ChangXin Memory Technologies is China’s largest DRAM manufacturer and, since late July, one of the country’s most valuable listed technology companies. It is also, for almost every reader of this page, unbuyable.

That combination is unusual enough to be worth explaining carefully, because it is now the clearest example on this site of a genuine access barrier — the thing SpaceX used to be before its June listing.

What happened in July

CXMT priced its IPO at 8.66 yuan a share and listed on the Shanghai Stock Exchange’s STAR Market on 27 July 2026. The stock opened above 49 yuan and closed its first day up roughly 466%.

It was Asia’s largest listing of the year and the biggest on mainland China since Agricultural Bank of China in 2010. The Hefei-based company raised on the order of $9–10 billion, most of it earmarked for conventional DRAM capacity.

One detail from the prospectus is worth more attention than the debut pop: there is no high-bandwidth memory project in it. The spending is aimed at conventional DRAM production. That single fact separates this company from every other memory name covered here.

Why you cannot buy the shares

The STAR Market is Shanghai’s technology board, and it is not open to ordinary foreign retail investors.

Foreign access to mainland Chinese equities generally runs through Northbound Stock Connect from Hong Kong. STAR Market shares were added to that channel, but with a restriction that matters: Northbound trading in STAR shares is limited to institutional professional investors. An ordinary overseas brokerage account does not qualify, and most brokers outside mainland China simply do not offer the board at all.

The practical result is a company with a market capitalisation among the largest in China that a foreign individual has no realistic route into. There is no ADR, no ETF that isolates it, and no Hong Kong dual listing.

Contract specs

Mark price	$8.336
24h volume	$1,867,102
Open interest	$29,642,009
Max leverage	10x
Funding rate (1h)	0.0006%

Data from Hyperliquid API, as of 2026-10-06. Ticker: CXMT

The routes, such as they are

A mainland brokerage account

The real answer, and available to essentially nobody reading this in English. It requires mainland residency or the kind of institutional status that makes this page irrelevant to you.

China or semiconductor ETFs

A broad China technology fund may hold it once index inclusion catches up, at a weight that will be small. You would be buying a basket in which this company is a rounding error, which is not a position in it.

The CXMT perpetual

USDC-settled, continuous, up to 10x, no mainland account and no professional-investor qualification.

What it costs you: no shares, no dividends, no votes. Funding hourly. A liquidation price. And an oracle-referenced mark rather than a market you could arbitrage against, because you cannot trade the underlying — which is exactly why the contract exists and exactly why you should size it carefully.

Two barriers at once

Most markets on this venue have one. This has both.

Access. Covered above, and unusually complete — this is not “hard to buy,” it is “not available to you.”

Hours. Shanghai trades roughly four hours a day, in two sessions, on a Chinese holiday calendar that differs from every Western one. The perpetual trades twenty-four. For most of any given day the contract is pricing a stock that is not trading, which is the same structural problem SK Hynix has in Seoul, in a more extreme form.

A four-hour market behind a 24-hour contract

When Shanghai is closed the mark moves on proxies — memory pricing, the US semiconductor session, other China tech — and on positioning. Those proxies get direction right more often than magnitude, and the difference resolves in one move at the Shanghai open. Add a stock that is two weeks into its listing and up several hundred percent from its offer price, and the gap you need to survive is large. Size for it rather than for the average hour.

Where it sits against the other memory names

The memory pages on this site now cover four distinct things, and CXMT is the fifth and least like the others:

SK Hynix — the concentrated high-bandwidth memory bet, and the main supplier to the AI build.
Micron — the diversified DRAM, HBM and NAND mix.
SanDisk — pure NAND, highest beta to that commodity.
The DRAM index — the commodity itself, with no company attached.
CXMT — conventional DRAM capacity, in China, with no HBM programme in its own capital plan.

That last point defines the trade. The rest of the industry’s story right now is AI: high-bandwidth memory consuming wafer capacity and dragging conventional DRAM prices up behind it. CXMT is positioned on the conventional side of that squeeze — a beneficiary of tight commodity DRAM pricing rather than a participant in the HBM cycle that is causing the tightness.

It is also a domestic-substitution story, which attaches a set of drivers none of the other names carry: export controls, equipment access, and Chinese policy support. Those move on a political calendar rather than an earnings one.

Practical notes

Liquidity. Around $11M of daily volume — above our guide threshold, but a fraction of Micron or SanDisk. Check the live figure above and expect slippage to matter more than it does on the larger contracts.
Funding. On a thinner market a single large position moves the rate. Check the annualised figure rather than assuming.
The oracle. With no tradeable underlying available to you, there is no arbitrage you could personally do to correct a mispricing. That is a structural feature of this contract, not a defect, but it belongs in your sizing.

Common questions

What is CXMT?

ChangXin Memory Technologies, China's largest DRAM manufacturer, based in Hefei. It listed on the Shanghai STAR Market on 27 July 2026 at an offer price of 8.66 yuan and closed its first day up roughly 466%, in the largest mainland China listing since 2010.

Can foreigners buy CXMT shares?

In practice, no. STAR Market shares are available through Northbound Stock Connect only to institutional professional investors, and most brokers outside mainland China do not offer the board at all. There is no ADR, no Hong Kong dual listing and no ETF that isolates the company.

Does CXMT make HBM?

Its IPO prospectus contains no high-bandwidth memory project — the capital raised is directed at conventional DRAM capacity. That distinguishes it from SK Hynix and Micron, whose current earnings story is largely HBM for AI accelerators.

What does the CXMT perpetual track?

The Shanghai-listed share price, through an oracle feed. Because you cannot trade the underlying, there is no arbitrage available to you to correct a divergence, and Shanghai trades only about four hours a day while the contract trades twenty-four.

How does CXMT compare to the DRAM index?

The DRAM index prices the commodity with no company attached. CXMT is one producer of it, carrying execution risk, Chinese policy exposure and export-control risk that the index does not. If your view is purely on memory prices, the index expresses it more cleanly.

The DRAM index is the commodity this company sells. Micron and SK Hynix are the incumbents it is designed to displace domestically. Samsung is the third member of the established oligopoly.