On July 27, 2026, during the European trading session, the stock prices of ASML and packaging equipment manufacturer BESI were violently slammed down by about 8% to 8.7% at nearly the same time, triggering a temporary suspension mechanism; after a brief suspension, trading resumed, but both companies continued to remain firmly pressed down in the range of about 7.4% to 8%, with selling pressure still intact. During the same period, the German semiconductor sector as a whole weakened, with Infineon down about 3%, Siltronic AG down about 4%, making this round of sell-offs feel more like an emotional outburst against the entire European chip supply chain. The market quickly caught onto a sensitive resonance point: several media outlets simultaneously cited a report from The Information, stating that a state-owned enterprise in China was reportedly starting to mass produce its self-developed DUV lithography equipment, and this rumor was seen as a potential key variable that could tilt the landscape. Although there is currently no public evidence proving a direct causal relationship between ASML and BESI's plummeting stocks and the news about the domestic DUV mass production, capital has already given a "preemptive answer"—once China completes the mass production of DUV lithography machines, the imagination space for European equipment giants regarding future revenue and discourse power may have to be re-priced.
Scene of ASML and BESI's Stock Plunge
According to surface data from a single source on that day, during the European trading session, the stock prices of ASML and BESI initially weakened slowly, then rapidly expanded their declines in a short time, reaching a range of about 8% to 8.7%, triggering the exchange's suspension mechanism. The quotes on the screen suddenly froze after continuous declines, and the buy-sell orders were "frozen" at a price level after a violent fluctuation, leaving the market to repeatedly speculate between news and rumors. After resuming trading, the stock prices of both companies did not show a significant technical rebound; instead, they continued to oscillate at low levels in the range of about 7.4% to 8%, clearly indicating that selling pressure and panic selling had not yet cleared out.
On the same timeline, it was not just these two stocks that "lost speed." The German semiconductor sector adjusted in unison, with Infineon dropping about 3% and Siltronic AG dropping about 4%, indicating that funds were squeezing out valuation across the entire industry chain. This sector resonance made the plunge of ASML and BESI appear more like an industry-wide emotional outburst rather than an isolated incident of a single company. It is important to emphasize that, as of now, there has been no public regulatory announcement or company statement clearly linking this round of selling to a specific financial report, a particular sanction, or a single policy variable; the suspension and resumption of trading were more technical responses to the intense short-term fluctuations, and the real causal chain remains speculative, necessitating that investors remain vigilant about the simplistic narrative of “the only negative news.”
How a Domestic DUV Rumor Ignited Panic
While the market was still searching for the "culprit" behind the plunge, multiple media outlets almost simultaneously reprinted the same clue—The Information cited insiders stating that a company backed by Chinese state capital had begun mass production of self-developed DUV lithography equipment. The wording of the report was deliberately restrained: it did not name the company but emphasized its "state-owned background"; it did not specify a model, only repeatedly mentioning that "mass production has begun." In the highly tense market atmosphere, such information was sufficient to be amplified into a story: if China really achieves DUV production at a mass producible level, then in the vast market of mature processes, which still highly relies on DUV, ASML would no longer be the only key player.
For European equipment manufacturers, the panic does not stem from selling a few less machines that day, but from the possibility of rewriting the order curve for the next decade. The chain interpretation by the market is very direct: once China masters and replicates DUV production lines, it equals inserting a new uncertain variable into ASML's revenue curve, especially as ASML's current advantages mainly lie in EUV while DUV serves as the "fundamental" for maintaining cash flow and customer stickiness. However, all of this currently remains within the "rumor chain"—the report did not disclose the company's name, nor any transparent data on yield rates, production capacities, or actual performance, let alone any public announcement from downstream customers about adoption. When investors attempt to connect this news to ASML and BESI's substantial drop to create a complete causal chain, they are, in fact, filling gaps with imagination, which also means that every verifiable signal from this mysterious vendor and its potential customers in the future will become critical in assessing whether this panic is a structural turning point or merely an exaggerated expectation disturbance.
The Long-term Collision Between ASML Monopoly and China's Catch-up
Behind this stock price curve stirred by rumors lies a long-standing structural confrontation. The reason why ASML is instinctively seen by the market as one of the "sole suppliers" is that it is the only company globally that can produce high-end EUV lithography machines, and in the broader segment of mature processes, its DUV lithography machines are also the central equipment for production lines—from whether a production line can be put into operation to the yield and cost of a wafer, many times depend on the delivery and service from this Dutch company. For most wafer fabs globally, EUV represents cutting-edge technology, while DUV signifies cash flow; ASML holds both keys, and its order scheduling and pricing naturally bear the posture of a monopolist.
Corresponding to this is China's long-term external reliance on lithography machines: high-end EUV equipment cannot be self-sourced at all, and even DUV required for mature processes heavily depends on overseas suppliers, including ASML. Although local companies have been reported to have made progress in the direction of lithography machines multiple times, they have consistently lacked the iconic threshold of "DUV equipment that can be mass-produced and adopted by mainstream wafer fabs," thus, once they truly achieve this step in DUV, it will almost inevitably be interpreted as a symbol of "self-sufficiency and control." For ASML, if Chinese manufacturers can deliver DUV equipment that withstands mass production testing and is adopted by mainstream wafer and memory manufacturers, its pricing and bargaining power in the mature process segment will be substantially weakened; for the global industry chain, this means that equipment supply would shift from a single center to multi-point competition, and power will no longer be concentrated on a list of European suppliers but will need to respond to new variables emerging from China as well. What truly decides the trajectory of this long-term collision is not the stock shock on July 27, but the verifiable outcome of whether domestic DUV can stabilize on real production lines.
Industrial Chain Shock from Changxin Storage Rumors
Before this round of rumors gained prominence, Changxin Storage had already become a key player in the local storage narrative. As an important DRAM chip manufacturer in China, it is considered one of the few factories that can do "the hardest things." For any domestic DUV lithography machine claiming to have reached mass production level, the true testing ground is not in press releases, but in production lines like those of Changxin: if even high-intensity, long-cycle DRAM processes can be sustained, the market will be willing to acknowledge its significance as "usable" rather than merely "able to light up."
Thus, when the anonymous domestic DUV mass production news was amplified on July 27, Changxin was almost instinctively included in analysts' simulation lists: who will be the first batch of customers, who dares to entrust critical processes to equipment from a non-traditional manufacturer, Changxin's name was repeatedly circled and questioned. Research briefs explicitly mentioned that if Changxin becomes one of the first adopters, it would be a landmark event validating the actual usability of domestic DUV, but this judgment currently remains at a hypothetical level. There has been no public document or company announcement confirming that Changxin has signed orders, introduced production lines, or completed mass production validation; all narratives treating it as a "certain customer" belong to the market's self-completion amidst uncertainty, and what can truly change the landscape is only the future public and verifiable adoption signals.
Emotional Pricing: How Much Future Risk Did the Rumor Amplify?
In the absence of any regulatory announcements or company statements to "back up" the situation, the drop of ASML and BESI by about 8% to 8.7% on July 27, 2026, and the subsequent forced suspension itself represents a typical case of "emotional pricing under conditions of incomplete information." The market only had one piece of information from the media: a company supported by Chinese state capital began mass producing DUV equipment, with no clarity on the company's name, parameters, or yield rates, but investors quickly internalized this message into ASML's pricing model—assuming that if China truly could mass-produce DUV, it would erode ASML's market share in mature processes, thereby lowering its revenue curve in the medium to long term. The simultaneous weakening of the German semiconductor sector, with Infineon dropping about 3% and Siltronic AG dropping about 4%, indicates that the sell-off was not isolated to a single company but rather a collective reevaluation of risk-reward across the entire European equipment chain.
From the stock price plunge triggering a suspension to the decline maintaining at about 7.4% to 8% after resuming trading, one can broadly discern the overlapping trajectory of short-term panic and long-term worries in this volatility: the former stems from a herd mentality of "others running first," amplifying subjective belief in the rumor's authenticity; the latter comes from institutional investors adding a scenario weight for "domestic DUV success" into their models, pricing what was originally a low-probability but high-destructive tail risk. The issue, however, lies in the fact that this entire expected chain is still merely an assumption without technical and commercial validation. For readers, it is more crucial not to simplify the single-day drop of about 8% as a trend reversal but to learn to view it as an "early signal candidate for structural pattern changes," distinguishing it from purely emotionally driven short-term fluctuations, and maintaining an awareness that both risks and opportunities remain not fully revealed until verifiable facts emerge in the future.
From Rumors to Reality: What Signals Should Investors Monitor?
Looking back from this roughly 8% single-day volatility, what truly needs to be closely monitored is not the stock price itself but several types of signals that can turn "rumors" into "facts." The first type is the official announcements from authoritative agencies or involved companies: the true identity of the domestic DUV lithography mass production enterprise, its ownership background, and what process and production lines it is positioned for, once confirmed by official channels, will reorganize the current understanding framework based solely on anonymous messages. The second type is disclosures from the technical and capacity dimension: even if it’s just rough information on resolution ranges, production capacity, yield targets, etc., it will directly influence the market's judgment on its ability to replace some imported equipment in mature processes. The third type is downstream customer adoption signals, especially companies like Changxin Storage that are seen as potential early adopters; if they publicly announce the adoption of domestic equipment in the future, it not only indicates that the machines "have been made," but also means passing the basic tests of reliability and cost on real production lines. From the perspective of global supply chain restructuring, investors also need to decompose ASML into two logics: EUV remains unique in the short term, with more variables in long-term technological evolution; for DUV, one must observe whether its order structure in China and other markets is showing marginal changes and whether it is being forced to concede in pricing, services, or supply strategies, while whether local equipment manufacturers can secure continuous, non-one-time orders in mature process production lines becomes the crucial watershed in determining whether this competition ultimately evolves into regional division of labor, parallel systems, or partial substitutions.
Join our community to discuss and grow stronger together!
Exclusive Hyperliquid benefits for AiCoin: https://app.hyperliquid.xyz/join/AICOIN88
Exclusive Aster benefits for AiCoin: https://www.asterdex.com/zh-CN/referral/9C50e2
On-chain Telegram community: https://t.me/AiCoinWhaleData
On-chain community: https://www.aicoin.com/link/chat?cid=N6OVMor5g
AiCoin on-chain Twitter: https://x.com/aicoinwhaledata
免责声明：本文章仅代表作者个人观点，不代表本平台的立场和观点。本文章仅供信息分享，不构成对任何人的任何投资建议。用户与作者之间的任何争议，与本平台无关。如网页中刊载的文章或图片涉及侵权，请提供相关的权利证明和身份证明发送邮件到support@aicoin.com，本平台相关工作人员将会进行核查。
