On July 27, 2026, ChangXin Memory Technologies began trading on the Shanghai Stock Exchange’s STAR Market. It sold 6.688 billion shares at RMB8.66 each, raising RMB57.92 billion, or about $8.6 billion. TechNode reported an opening price of RMB49.50, and by the midday break the stock stood at RMB54.65, up 531% from the offer price, with a market value of RMB3.66 trillion. Those are snapshots from a single morning and say nothing about where the shares trade today.
CXMT also appears today as a perpetual contract on several crypto-native derivatives venues. For readers outside China, that raises an obvious question: what exactly is being traded when an on-chain market carries a Shanghai ticker?
The company and the listing
CXMT makes DRAM, the working memory used in computers, phones and servers. TechNode describes it as China’s largest DRAM maker, and Canborsa’s profile adds that it ranks fourth worldwide, with DDR5, LPDDR5X, DDR4 and LPDDR4X products made in 12-inch fabs in Hefei and Beijing. A company announcement reported by The Paper gives the A-share code as 688825.
Recent growth has been steep. First-quarter 2026 revenue was RMB50.8 billion, up more than 700% year over year, according to TechNode. Memory is also a notably cyclical industry, so a single strong period is a weak basis for any assumption about the next one.
What the perpetual references
The ChangXin Memory (CXMT) perpetual market on Canborsa names CXMT on the Shanghai Stock Exchange STAR Market, SSE: 688825, as its underlying reference. The contract’s terms are:
- Up to 5x leverage, margined and settled in USDC on Canton
- A trading fee of 0.055% per side
- Funding charged hourly on notional, for 24 settlements a day
- Long or short, around the clock, with no expiry date
The current quote and funding rate appear in live fields on that page, and this article deliberately quotes neither. The page states that a position tracks price and does not give ownership of the underlying. You hold no A-shares and have no shareholder rights. Nor does the page describe any arrangement with the company or the exchange, so a contract’s existence should not be read as an endorsement by either.
The clock problem
This is the feature that sets CXMT apart from a US-listed perpetual. The Shanghai market’s main sessions run from 9:30 to 11:30 a.m. and 1:00 to 3:00 p.m. China time on trading days. That is about 20 hours in a 168-hour week, or roughly 12%, before accounting for mainland holidays. The perpetual trades through the other 88%.
From Friday’s close to Monday’s open alone is 66.5 hours. During the hours when Shanghai is shut, the perp’s price reflects its own traders’ views and whatever pricing method the venue uses. The page does not detail that method, so a trader should ask about it directly.
A second difference is the price limit. The Shanghai Stock Exchange’s rules apply a daily band of 20% to STAR Market stocks after their first five trading days. A perpetual is not obviously bound by the same band. If the shares are pinned at a limit, the contract could trade well beyond it, and the difference would then resolve across later sessions.
How venues compare
Canborsa’s table lists seven platforms offering a CXMT perpetual, and the terms are far from uniform:
- Canborsa: 0.055% per side, with up to 5x according to the FAQ
- Lighter: 5x, with a 0% taker fee
- Ondo: 10x, 0.025%
- Hyperliquid and edgeX: 10x, 0.045%
- ApeX: 50x, 0.05%
- Aster: 0.04%, with no leverage figure shown
A 50x setting on a stock that can move 20% in one session tells you what a venue permits and little about what a position can survive. Lower limits may be the more realistic design on an instrument like this one.
An illustrative position
Assume a $2,000 long, with hypothetical inputs chosen only to show the arithmetic.
At the 5x maximum, the position needs $400 of margin. A 20% fall, which is a single limit-down day for the underlying, would equal $400. The margin would be gone, and liquidation would come earlier than that once maintenance requirements apply. At 2x, the same position needs $1,000 of margin, and the same fall costs 40% of it while leaving the position open.
Costs on that $2,000 include $2.20 for the round-trip fee. Suppose funding runs against the position at a hypothetical 20% a year. That is about $0.046 an hour, or about $7.67 over one week, and it accrues during the many hours when no underlying trade is printing.
Risks to keep in view
- Liquidation and gaps. Shanghai can open sharply away from where the perp spent the night, and a stop may fill beyond its level.
- Funding. Rates can be volatile on narrowly traded contracts, and they settle every hour.
- A young market. The shares have traded only since July 2026, so the history for judging normal behaviour is short.
- Technical. Smart contract, oracle and stablecoin failures all sit on top of price risk. An oracle tied to a market that is shut most of the week deserves particular attention.
- Legal. Rules on derivatives differ by country, and a stock’s location does not change your own local position. Access to the actual shares is a separate matter of brokerage and regulation.
A sensible way to approach it
Treat the CXMT perpetual as a price instrument that spends most of each week trading while its underlying is closed. Read the specification, use leverage low enough to survive a limit move, and plan around Shanghai’s calendar as well as your own. If you want to own the company, this contract does not provide that.
This article is for educational purposes only and is not financial advice. Leveraged derivatives carry a high risk of loss.