ACT Flash Crash Night: When Exchange Circuit Breaker Turns into a Short-Selling Bullet

By: blockbeats|2025/04/02 12:00:04
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Original Article Title: "Decrypting the Triple Labyrinth Behind ACT's Flash Crash, Has Exchange Risk Control Become a 'Nuclear Button'?"
Original Article Author: Frank, PANews

A routine contract rule adjustment by Binance unexpectedly exposed the most vulnerable sore spot in the crypto market.

On April 1st, a flash crash event that collectively halved the value of low-market-cap tokens like ACT in half an hour brought the exchange risk control mechanisms, market maker algorithm strategies, and the fatal flaws of the MEME coin ecosystem into the spotlight simultaneously.

Despite Binance's emergency response blaming "whale selling," the cliff-like evaporation of 75% of the contract positions, the precise synchronous price fluctuations of multiple currencies, and the mysterious on-chain dump by market maker Wintermute after the crash, all revealed a deeper industry vulnerability in this dilemma. In the current environment of weak liquidity, exchanges attempting to patch up system risks may instead become the final straw that crushes the market.

Half-Hour Flash Crash of Multiple Tokens

On April 1st at 15:32, Binance released an announcement regarding the adjustment of leverage and margin tier of multiple U-based perpetual futures contracts, involving several trading pairs such as 1000SATSUSDT, ACTUSDT, PNUTUSDT, NEOUSDT, NEOUSDC, etc. Based on the content of this adjustment, it mainly focused on adjusting the contract trading position limits and leverage margin ratios of these tokens. Taking ACT as an example, the pre-adjustment position limit was a maximum of $4.5 million, which was reduced to a maximum of $3.5 million after the adjustment. The announcement indicated the adjustment time was 18:30.

ACT Flash Crash Night: When Exchange Circuit Breaker Turns into a Short-Selling Bullet

At 18:30 on the same day, ACT plummeted from $0.1899 to $0.0836 within 36 minutes, a 55% drop, sparking intense discussions in the market.

Almost simultaneously with ACT, several low-market-cap tokens on Binance such as TST, HIPPO, DEXE, PNUT experienced flash crash events to varying degrees, with price drops ranging between 20% to 50%. Market data shows that 18:30 became the starting point for a cliff-like drop in prices of multiple tokens, extending far beyond a single project, demonstrating clear synchronicity.

Specifically, this adjustment reduced the maximum position size one could hold with leverage. For example, previously, with a certain leverage, you could hold $1 million worth of a token, but now with the rule change, you may only be able to hold a maximum of $800,000. If users did not voluntarily close their positions, the system would forcibly liquidate the excess positions at market price when the rule took effect. Therefore, a significant drop in contract prices could occur within a short time frame, triggering a cascading event.

In response, a significant amount of discussion was sparked on social media, with @terryroom2014 pointing out, "18:30 Binance contract positions plunged, with the exchange actively liquidating large holders, leading to a price crash"; @yinshanguancha believed that "Market Makers were forcibly liquidated due to insufficient margin, and the rule adjustment was the catalyst." Most users pointed their fingers at Binance's rule adjustment, believing that lowering the position limit triggered forced liquidation, subsequently causing panic selling and a market stampede effect.

Some users also speculated that this was due to ACT's Market Makers actively dumping the price, with @Web3Tinkle noting that ACT's position on Binance decreased by $73 million in just 15 minutes, suggesting that the project team and Market Makers instantly dumped their holdings to harvest the market.

In response, Binance's co-founder He Yi stated during an interaction on Platform X that when asked whether the sharp drop in ACT was due to Binance modifying the contract rules, He Yi responded that the "team is preparing the details for a reply."

Approximately 2 hours later, Binance released a preliminary investigation report on the incident, stating that this ACT's decline was mainly due to three VIP users and one non-VIP user selling about $1.05 million worth of spot tokens in a short period, causing the price drop and affecting the decline of other tokens. In summary, Binance's response believes that the main reason for this short-term plunge was the large holders selling off, rather than Binance's rule adjustments.

Exchange Risk Control: Overcorrection or Market Maker Liquidation for Self-Protection?

This market flash crash event inevitably brings back memories of the recent Hyperliquid lightning attack incident. On March 26, Decentralized Exchange Hyperliquid encountered a trader exploiting a liquidity design flaw to cascade a huge short order onto the platform by withdrawing collateral, nearly causing a loss of over tens of millions of dollars to Hyperliquid's treasury.

Perhaps taking a cue from the Hyperliquid event, Binance attempted to mitigate risks by lowering the parameters for low-cap tokens in contracts, but inadvertently triggered a market minefield beforehand.

In addition to Binance's rule adjustment seemingly serving as the catalyst, Market Maker Wintermute was also suspected as the mastermind behind the scenes. On one hand, the rule adjustment by Binance had the most significant impact on the Market Maker group. @CnmdRain analyzed, "This adjustment particularly affects Market Makers (MM) because they usually rely on high leverage and large positions to maintain market liquidity and earn spread profits."

Prior speculation by Ember indicated that Wintermute may be the market maker for ACT (having received 9.482 million ACT tokens from the ACT community wallet in November 2024) and, following a sharp decline in ACT's price, Wintermute withdrew multiple batches of ACT tokens from the Binance exchange and sold them on-chain.

In response to this, Wintermute's founder, Evgeny Gaevoy, stated that the company was not involved in the orchestrated operation behind the meme coin crash of ACT and only arbitrated the AMM liquidity pool after significant price fluctuations. He emphasized that Wintermute was not the party responsible for triggering the market turbulence this time and is currently monitoring the developments post-event.

Faced with this tumultuous event, the ACT team also responded by initiating an investigation, collaborating with relevant parties to address the issue, and working with trusted partners to devise a response plan together.

Can 75% Asset Disappearance be Explained by "Whale Dump"?

So far, all parties involved in this flash crash event seem to have responded promptly and distanced themselves from any responsibility. However, there are still many questions lingering.

Firstly, Binance's initial investigation report appears to lack credibility. Binance's report suggests that the ACT token's decline was linked to three VIP users and one non-VIP user dumping large amounts of ACT tokens. However, this does not mean that every token's decline was driven by similar user sell-offs. For the ACT token, user sell-offs may be the direct cause of ACT's decline, while the underlying reasons for multiple token declines seem to still be somewhat related to this rule adjustment.

CoinGlass data shows that at 18:30, Binance's ACT contract holdings plummeted by 75%, and similar situations were observed in the holdings of several other tokens mentioned in adjustment announcements. This is hard to explain as solely caused by individual whale spot sell-offs.

Secondly, however, this decline does not seem to be entirely due to the rule adjustment. From the trends of several tokens, ACT experienced the most significant drop, while other tokens undergoing the same adjustments, such as 1000SATS, also saw declines but not as extreme as ACT's. Additionally, another token, DEXE, that experienced a significant drop is not part of this adjustment. Tokens like MEW, which are listed for adjustment, did not fall as a result but rather began an upward trend.

Third, was Wintermute's exit a coincidence or intentional? During the ACT crash, Wintermute sold off multiple holdings of MEME tokens, causing varying degrees of flash crashes in the prices of these tokens. Some social media users speculated that the main reason for this decline was that Wintermute's algorithmic bots ran into issues due to rule constraints.

Overall, this brief flash crash seems to be more comprehensively explained as a trigger point where Binance adjusted some token contract position rules, leading to algorithmic bots of market makers like Wintermute failing to adjust promptly.

However, regardless of the specific cause of this flash crash, the market/user always ends up holding the bag.

According to Coinglass data, following the ACT flash crash, ACT contracts liquidated $8.71 million, ranking third globally (only behind Bitcoin and Ethereum). Moreover, users holding spot assets also suffered halving of their assets and seemed to have difficulty recovering in a short period.

Overall, there are several underlying reasons for this flash crash. First, after the Hyperliquid incident, exchanges began to pay more attention to the risk of whale manipulation in the market and started making adjustments. While this was supposed to be a good move, it inadvertently triggered another stampede. Second, due to the cooling of the MEME market, related tokens became fragile and sensitive in terms of trading depth and sentiment. Hence, once an abnormal trade occurred, it exposed the reality that MEME tokens lack substantial value support.

This multi-million-dollar crypto market "April Fool's Day Nightmare" ultimately concluded with an "responsibility shifting" agreement among exchanges, market makers, and project teams. However, the warning buried within is far more chilling than what meets the eye. While this flash crash may not have a clear "culprit," it exposed the most fundamental rule of survival in the crypto market: within the intricate system built by institutions and whales, retail investors often become passive bearers of systemic fluctuations.

Original Article Link

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China's Central Bank and Eight Other Departments' Latest Regulatory Focus: Key Attention to RWA Tokenized Asset Risk


Foreword: Today, the People's Bank of China's website published the "Notice of the People's Bank of China, National Development and Reform Commission, Ministry of Industry and Information Technology, Ministry of Public Security, State Administration for Market Regulation, China Banking and Insurance Regulatory Commission, China Securities Regulatory Commission, State Administration of Foreign Exchange on Further Preventing and Dealing with Risks Related to Virtual Currency and Others (Yinfa [2026] No. 42)", the latest regulatory requirements from the eight departments including the central bank, which are basically consistent with the regulatory requirements of recent years. The main focus of the regulation is on speculative activities such as virtual currency trading, exchanges, ICOs, overseas platform services, and this time, regulatory oversight of RWA has been added, explicitly prohibiting RWA tokenization, stablecoins (especially those pegged to the RMB). The following is the full text:


To the people's governments of all provinces, autonomous regions, and municipalities directly under the Central Government, the Xinjiang Production and Construction Corps:


  Recently, there have been speculative activities related to virtual currency and Real-World Assets (RWA) tokenization, disrupting the economic and financial order and jeopardizing the property security of the people. In order to further prevent and address the risks related to virtual currency and Real-World Assets tokenization, effectively safeguard national security and social stability, in accordance with the "Law of the People's Republic of China on the People's Bank of China," "Law of the People's Republic of China on Commercial Banks," "Securities Law of the People's Republic of China," "Law of the People's Republic of China on Securities Investment Funds," "Law of the People's Republic of China on Futures and Derivatives," "Cybersecurity Law of the People's Republic of China," "Regulations of the People's Republic of China on the Administration of Renminbi," "Regulations on Prevention and Disposal of Illegal Fundraising," "Regulations of the People's Republic of China on Foreign Exchange Administration," "Telecommunications Regulations of the People's Republic of China," and other provisions, after reaching consensus with the Cyberspace Administration of China, the Supreme People's Court, and the Supreme People's Procuratorate, and with the approval of the State Council, the relevant matters are notified as follows:


  I. Clarify the essential attributes of virtual currency, Real-World Assets tokenization, and related business activities


  (I) Virtual currency does not possess the legal status equivalent to fiat currency. Virtual currencies such as Bitcoin, Ether, Tether, etc., have the main characteristics of being issued by non-monetary authorities, using encryption technology and distributed ledger or similar technology, existing in digital form, etc. They do not have legal tender status, should not and cannot be circulated and used as currency in the market.


  The business activities related to virtual currency are classified as illegal financial activities. The exchange of fiat currency and virtual currency within the territory, exchange of virtual currencies, acting as a central counterparty in buying and selling virtual currencies, providing information intermediary and pricing services for virtual currency transactions, token issuance financing, and trading of virtual currency-related financial products, etc., fall under illegal financial activities, such as suspected illegal issuance of token vouchers, unauthorized public issuance of securities, illegal operation of securities and futures business, illegal fundraising, etc., are strictly prohibited across the board and resolutely banned in accordance with the law. Overseas entities and individuals are not allowed to provide virtual currency-related services to domestic entities in any form.


  A stablecoin pegged to a fiat currency indirectly fulfills some functions of the fiat currency in circulation. Without the consent of relevant authorities in accordance with the law and regulations, any domestic or foreign entity or individual is not allowed to issue a RMB-pegged stablecoin overseas.


(II)Tokenization of Real-World Assets refers to the use of encryption technology and distributed ledger or similar technologies to transform ownership rights, income rights, etc., of assets into tokens (tokens) or other interests or bond certificates with token (token) characteristics, and carry out issuance and trading activities.


  Engaging in the tokenization of real-world assets domestically, as well as providing related intermediary, information technology services, etc., which are suspected of illegal issuance of token vouchers, unauthorized public offering of securities, illegal operation of securities and futures business, illegal fundraising, and other illegal financial activities, shall be prohibited; except for relevant business activities carried out with the approval of the competent authorities in accordance with the law and regulations and relying on specific financial infrastructures. Overseas entities and individuals are not allowed to illegally provide services related to the tokenization of real-world assets to domestic entities in any form.


  II. Sound Work Mechanism


  (III) Inter-agency Coordination. The People's Bank of China, together with the National Development and Reform Commission, the Ministry of Industry and Information Technology, the Ministry of Public Security, the State Administration for Market Regulation, the China Banking and Insurance Regulatory Commission, the China Securities Regulatory Commission, the State Administration of Foreign Exchange, and other departments, will improve the work mechanism, strengthen coordination with the Cyberspace Administration of China, the Supreme People's Court, and the Supreme People's Procuratorate, coordinate efforts, and overall guide regions to carry out risk prevention and disposal of virtual currency-related illegal financial activities.


  The China Securities Regulatory Commission, together with the National Development and Reform Commission, the Ministry of Industry and Information Technology, the Ministry of Public Security, the People's Bank of China, the State Administration for Market Regulation, the China Banking and Insurance Regulatory Commission, the State Administration of Foreign Exchange, and other departments, will improve the work mechanism, strengthen coordination with the Cyberspace Administration of China, the Supreme People's Court, and the Supreme People's Procuratorate, coordinate efforts, and overall guide regions to carry out risk prevention and disposal of illegal financial activities related to the tokenization of real-world assets.


  (IV) Strengthening Local Implementation. The people's governments at the provincial level are overall responsible for the prevention and disposal of risks related to virtual currencies and the tokenization of real-world assets in their respective administrative regions. The specific leading department is the local financial regulatory department, with participation from branches and dispatched institutions of the State Council's financial regulatory department, telecommunications regulators, public security, market supervision, and other departments, in coordination with cyberspace departments, courts, and procuratorates, to improve the normalization of the work mechanism, effectively connect with the relevant work mechanisms of central departments, form a cooperative and coordinated working pattern between central and local governments, effectively prevent and properly handle risks related to virtual currencies and the tokenization of real-world assets, and maintain economic and financial order and social stability.


  III. Strengthened Risk Monitoring, Prevention, and Disposal


  (5) Enhanced Risk Monitoring. The People's Bank of China, China Securities Regulatory Commission, National Development and Reform Commission, Ministry of Industry and Information Technology, Ministry of Public Security, State Administration of Foreign Exchange, Cyberspace Administration of China, and other departments continue to improve monitoring techniques and system support, enhance cross-departmental data analysis and sharing, establish sound information sharing and cross-validation mechanisms, promptly grasp the risk situation of activities related to virtual currency and real-world asset tokenization. Local governments at all levels give full play to the role of local monitoring and early warning mechanisms. Local financial regulatory authorities, together with branches and agencies of the State Council's financial regulatory authorities, as well as departments of cyberspace and public security, ensure effective connection between online monitoring, offline investigation, and fund tracking, efficiently and accurately identify activities related to virtual currency and real-world asset tokenization, promptly share risk information, improve early warning information dissemination, verification, and rapid response mechanisms.


  (6) Strengthened Oversight of Financial Institutions, Intermediaries, and Technology Service Providers. Financial institutions (including non-bank payment institutions) are prohibited from providing account opening, fund transfer, and clearing services for virtual currency-related business activities, issuing and selling financial products related to virtual currency, including virtual currency and related financial products in the scope of collateral, conducting insurance business related to virtual currency, or including virtual currency in the scope of insurance liability. Financial institutions (including non-bank payment institutions) are prohibited from providing custody, clearing, and settlement services for unauthorized real-world asset tokenization-related business and related financial products. Relevant intermediary institutions and information technology service providers are prohibited from providing intermediary, technical, or other services for unauthorized real-world asset tokenization-related businesses and related financial products.


  (7) Enhanced Management of Internet Information Content and Access. Internet enterprises are prohibited from providing online business venues, commercial displays, marketing, advertising, or paid traffic diversion services for virtual currency and real-world asset tokenization-related business activities. Upon discovering clues of illegal activities, they should promptly report to relevant departments and provide technical support and assistance for related investigations and inquiries. Based on the clues transferred by the financial regulatory authorities, the cyberspace administration, telecommunications authorities, and public security departments should promptly close and deal with websites, mobile applications (including mini-programs), and public accounts engaged in virtual currency and real-world asset tokenization-related business activities in accordance with the law.


  (8) Strengthened Entity Registration and Advertisement Management. Market supervision departments strengthen entity registration and management, and enterprise and individual business registrations must not contain terms such as "virtual currency," "virtual asset," "cryptocurrency," "crypto asset," "stablecoin," "real-world asset tokenization," or "RWA" in their names or business scopes. Market supervision departments, together with financial regulatory authorities, legally enhance the supervision of advertisements related to virtual currency and real-world asset tokenization, promptly investigating and handling relevant illegal advertisements.


  (IX) Continued Rectification of Virtual Currency Mining Activities. The National Development and Reform Commission, together with relevant departments, strictly controls virtual currency mining activities, continuously promotes the rectification of virtual currency mining activities. The people's governments of various provinces take overall responsibility for the rectification of "mining" within their respective administrative regions. In accordance with the requirements of the National Development and Reform Commission and other departments in the "Notice on the Rectification of Virtual Currency Mining Activities" (NDRC Energy-saving Building [2021] No. 1283) and the provisions of the "Guidance Catalog for Industrial Structure Adjustment (2024 Edition)," a comprehensive review, investigation, and closure of existing virtual currency mining projects are conducted, new mining projects are strictly prohibited, and mining machine production enterprises are strictly prohibited from providing mining machine sales and other services within the country.


  (X) Severe Crackdown on Related Illegal Financial Activities. Upon discovering clues to illegal financial activities related to virtual currency and the tokenization of real-world assets, local financial regulatory authorities, branches of the State Council's financial regulatory authorities, and other relevant departments promptly investigate, determine, and properly handle the issues in accordance with the law, and seriously hold the relevant entities and individuals legally responsible. Those suspected of crimes are transferred to the judicial authorities for processing according to the law.


 (XI) Severe Crackdown on Related Illegal and Criminal Activities. The Ministry of Public Security, the People's Bank of China, the State Administration for Market Regulation, the China Banking and Insurance Regulatory Commission, the China Securities Regulatory Commission, as well as judicial and procuratorial organs, in accordance with their respective responsibilities, rigorously crack down on illegal and criminal activities related to virtual currency, the tokenization of real-world assets, such as fraud, money laundering, illegal business operations, pyramid schemes, illegal fundraising, and other illegal and criminal activities carried out under the guise of virtual currency, the tokenization of real-world assets, etc.


  (XII) Strengthen Industry Self-discipline. Relevant industry associations should enhance membership management and policy advocacy, based on their own responsibilities, advocate and urge member units to resist illegal financial activities related to virtual currency and the tokenization of real-world assets. Member units that violate regulatory policies and industry self-discipline rules are to be disciplined in accordance with relevant self-regulatory management regulations. By leveraging various industry infrastructure, conduct risk monitoring related to virtual currency, the tokenization of real-world assets, and promptly transfer issue clues to relevant departments.


  IV. Strict Supervision of Domestic Entities Engaging in Overseas Business Activities


(XIII) Without the approval of relevant departments in accordance with the law and regulations, domestic entities and foreign entities controlled by them may not issue virtual currency overseas.


  (XIV) Domestic entities engaging directly or indirectly in overseas external debt-based tokenization of real-world assets, or conducting asset securitization activities abroad based on domestic ownership rights, income rights, etc. (hereinafter referred to as domestic equity), should be strictly regulated in accordance with the principles of "same business, same risk, same rules." The National Development and Reform Commission, the China Securities Regulatory Commission, the State Administration of Foreign Exchange, and other relevant departments regulate it according to their respective responsibilities. For other forms of overseas real-world asset tokenization activities based on domestic equity by domestic entities, the China Securities Regulatory Commission, together with relevant departments, supervise according to their division of responsibilities. Without the consent and filing of relevant departments, no unit or individual may engage in the above-mentioned business.


  (15) Overseas subsidiaries and branches of domestic financial institutions providing Real World Asset Tokenization-related services overseas shall do so legally and prudently. They shall have professional personnel and systems in place to effectively mitigate business risks, strictly implement customer onboarding, suitability management, anti-money laundering requirements, and incorporate them into the domestic financial institutions' compliance and risk management system. Intermediaries and information technology service providers offering Real World Asset Tokenization services abroad based on domestic equity or conducting Real World Asset Tokenization business in the form of overseas debt for domestic entities directly or indirectly venturing abroad must strictly comply with relevant laws and regulations. They should establish and improve relevant compliance and internal control systems in accordance with relevant normative requirements, strengthen business and risk control, and report the business developments to the relevant regulatory authorities for approval or filing.


  V. Strengthen Organizational Implementation


  (16) Strengthen organizational leadership and overall coordination. All departments and regions should attach great importance to the prevention of risks related to virtual currencies and Real World Asset Tokenization, strengthen organizational leadership, clarify work responsibilities, form a long-term effective working mechanism with centralized coordination, local implementation, and shared responsibilities, maintain high pressure, dynamically monitor risks, effectively prevent and mitigate risks in an orderly and efficient manner, legally protect the property security of the people, and make every effort to maintain economic and financial order and social stability.


  (17) Widely carry out publicity and education. All departments, regions, and industry associations should make full use of various media and other communication channels to disseminate information through legal and policy interpretation, analysis of typical cases, and education on investment risks, etc. They should promote the illegality and harm of virtual currencies and Real World Asset Tokenization-related businesses and their manifestations, fully alert to potential risks and hidden dangers, and enhance public awareness and identification capabilities for risk prevention.


  VI. Legal Responsibility


  (18) Engaging in illegal financial activities related to virtual currencies and Real World Asset Tokenization in violation of this notice, as well as providing services for virtual currencies and Real World Asset Tokenization-related businesses, shall be punished in accordance with relevant regulations. If it constitutes a crime, criminal liability shall be pursued according to the law. For domestic entities and individuals who knowingly or should have known that overseas entities illegally provided virtual currency or Real World Asset Tokenization-related services to domestic entities and still assisted them, relevant responsibilities shall be pursued according to the law. If it constitutes a crime, criminal liability shall be pursued according to the law.


  (19) If any unit or individual invests in virtual currencies, Real World Asset Tokens, and related financial products against public order and good customs, the relevant civil legal actions shall be invalid, and any resulting losses shall be borne by them. If there are suspicions of disrupting financial order and jeopardizing financial security, the relevant departments shall deal with them according to the law.


  This notice shall enter into force upon the date of its issuance. The People's Bank of China and ten other departments' "Notice on Further Preventing and Dealing with the Risks of Virtual Currency Trading Speculation" (Yinfa [2021] No. 237) is hereby repealed.


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