Introduction
Market manipulation in Turkey is one of the most serious violations under Turkish Capital Market Law. It directly threatens investor confidence, fair price formation, market transparency and the reliability of Borsa İstanbul and other organized markets. For this reason, Turkish law treats market manipulation not merely as an unfair market practice, but as a conduct that may result in criminal imprisonment, judicial fines, administrative sanctions, trading bans, disgorgement-like measures, civil liability and reputational damage.
The main legislation is Capital Markets Law No. 6362, regulated and enforced by the Capital Markets Board of Türkiye, known as the CMB in English and SPK in Turkish. Market manipulation is mainly addressed under Article 107 of Capital Markets Law No. 6362. The SPK’s investor guidance explains that Article 107 regulates two principal forms of market manipulation: transaction-based market manipulation and information-based market manipulation.
In practice, market manipulation may occur through artificial trading, false orders, order cancellations, coordinated account movements, misleading rumors, false reports, social media campaigns, Telegram or WhatsApp groups, pump-and-dump schemes, misleading public statements, or trading activities designed to create a false appearance of supply, demand, price or volume. The legal consequences can be severe not only for the main manipulator, but also for persons who assist, disseminate misleading information, use accounts for manipulative transactions or knowingly participate in coordinated schemes.
Legal Framework of Market Manipulation in Turkey
The legal framework for market manipulation in Turkey is primarily based on Capital Markets Law No. 6362, the Market Abuse Communiqué VI-104.1, the Communiqué on Obligation of Notification Regarding Insider Trading or Manipulation Crimes V-102.1, and the Communiqué on Measures to Be Taken for Insider Trading and Manipulation Investigations V-101.1. The CMB’s official communiqué list expressly includes these regulations among the core secondary rules of Turkish capital markets.
The Market Abuse Communiqué VI-104.1 was published in the Official Gazette on 21 January 2014. According to the SPK’s own press release, the purpose of this communiqué is to identify acts and transactions that cannot be explained by a reasonable economic or financial justification and that may disrupt the trustworthy, transparent and stable functioning of exchanges and other organized markets.
This framework shows that Turkish law distinguishes between criminal market manipulation and market abuse actions. Some conduct may constitute the criminal offence of market manipulation under Article 107. Other conduct may be treated as a market abuse action under Article 104 and the Market Abuse Communiqué, even where the elements of the criminal offence are not fully established. Therefore, a transaction may still trigger CMB sanctions even if it does not result in a criminal conviction.
Transaction-Based Market Manipulation
Transaction-based market manipulation is regulated under Article 107/1 of Capital Markets Law No. 6362. The SPK explains that the material element of this offence includes buying or selling capital market instruments, placing orders, cancelling orders, changing orders or carrying out account movements. These acts may be manipulative where they create a false or misleading impression regarding the prices, price changes, supply or demand of capital market instruments.
Transaction-based manipulation may take many forms. For example, a person may buy and sell the same security through related accounts to create artificial volume. A group of investors may coordinate purchases to push the price upward and then sell to retail investors at inflated levels. A trader may place large orders without genuine intent to execute, merely to influence other market participants. Another person may cancel or modify orders repeatedly to create misleading depth in the order book.
The key legal issue is whether the transactions, orders or account activities are capable of creating a false or misleading market appearance. Turkish law does not require that every suspicious transaction automatically be treated as manipulation. However, when trading behavior cannot be explained by a reasonable economic or financial justification and appears designed to influence price, volume, supply or demand, the CMB may initiate surveillance, inspection and enforcement action.
Legal Consequences of Transaction-Based Manipulation
The SPK states that persons who buy, sell, place orders, cancel orders, change orders or conduct account movements with the purpose of creating a false or misleading impression regarding the prices, price changes, supply or demand of capital market instruments may be punished with imprisonment from three to five years and a judicial fine from five thousand to ten thousand days. The judicial fine cannot be less than the benefit obtained through the offence.
This is a heavy sanction. It means that market manipulation is not treated merely as a regulatory violation. It may become a criminal case before criminal courts. The public prosecutor may investigate, the CMB may file a criminal complaint, and suspects may face both imprisonment and financial sanctions.
The rule that the judicial fine cannot be less than the benefit obtained is particularly important. Manipulation often aims to generate unlawful profit. If the sanction were lower than the gain, it would become a cost of doing business. Turkish law therefore links the financial sanction to the unlawful benefit, making the penalty more deterrent.
Information-Based Market Manipulation
Information-based market manipulation is regulated under Article 107/2 of Capital Markets Law No. 6362. It concerns false, misleading or deceptive information, rumors, news, comments or reports that are intended to affect the price or value of capital market instruments or investors’ decisions.
The SPK explains that persons who provide false, incorrect or misleading information, start rumors, give news, make comments, prepare reports or disseminate such information in order to affect the prices or values of capital market instruments or investors’ decisions, and thereby obtain a benefit, may be punished with imprisonment from three to five years and a judicial fine of up to five thousand days.
The CMB’s English announcement on Article 107/2 explains that information-based manipulation under Law No. 6362 requires misleading, false or deceptive information, news, comments or reports, together with the special intention to influence the price or value of capital market instruments or investors’ decisions.
Information-based manipulation is especially relevant in modern markets because information spreads rapidly through digital channels. A misleading post on X, a Telegram message, a WhatsApp group note, a YouTube video, an anonymous forum post or a fake analyst report may reach thousands of investors within minutes. Where such communication is designed to affect investor decisions and is connected with benefit, serious criminal and administrative liability may arise.
Social Media and Market Manipulation
Social media has become one of the most important areas of market manipulation enforcement. The CMB warned in 2020 that membership-based groups on platforms such as Facebook, Twitter, WhatsApp and Telegram were being used by unauthorized persons to manipulate and victimize investors. The same announcement stated that Article 107 of Capital Markets Law No. 6362 regulates both transaction-based and information-based market fraud.
This warning remains highly relevant. Many manipulation schemes today are not conducted through traditional newsletters or physical meetings. They are conducted through online communities. A manipulator may first accumulate a low-liquidity stock, then spread rumors through social media, create artificial excitement, encourage retail investors to buy, and finally sell at inflated prices. This is commonly known as a pump-and-dump pattern.
Investors should be particularly cautious of statements such as “this stock will definitely rise,” “inside information has arrived,” “big fund is entering,” “do not sell before target price,” “limited opportunity,” or “guaranteed profit.” Such messages may not only mislead investors but may also form part of a manipulation file if they are connected with trading activity.
Market Abuse Actions Under the Market Abuse Communiqué
Not every market abuse action must necessarily reach the criminal threshold of market manipulation. The Market Abuse Communiqué VI-104.1 identifies acts that may disrupt the safe, transparent and stable functioning of the market even where criminal liability is not established.
The communiqué classifies market abuse actions under several categories, including acts related to inside or continuous information, acts related to orders or transactions, acts committed through communication or news, and other market abuse actions. The SPK’s 2014 press release expressly states that the communiqué was prepared under Article 104 of Capital Markets Law No. 6362 and defines market abuse actions under four main headings.
This distinction matters in practice. A trader may argue that there was no criminal intent or that the conduct does not meet the elements of Article 107. However, the CMB may still consider the conduct as a market abuse action and impose administrative sanctions. Therefore, market participants should not assume that only criminal manipulation is risky. Administrative market abuse sanctions may also be serious.
Acts Not Considered Market Abuse
Turkish law also recognizes that not every price-affecting communication or transaction is unlawful. Article 8 of the Market Abuse Communiqué provides that acts not considered insider trading or manipulation under Article 108 of the law are not treated as market abuse actions. It also recognizes protection for journalistic activities carried out in accordance with press professional principles and ethical rules, provided that certain conditions are met.
This is important for analysts, journalists, academics, financial commentators and media organizations. Capital markets need information and commentary. A negative article about a listed company is not automatically manipulation. A critical analyst report is not automatically unlawful. However, the protection may not apply if the person obtains unfair advantage, acts under the guidance of manipulators, trades before publication, or knowingly disseminates false or misleading information.
The practical line is this: honest, evidence-based, properly disclosed financial commentary is generally different from manipulative rumor-spreading. The legal risk increases where the person has trading positions, undisclosed conflicts of interest, coordination with traders, false information, or a purpose to influence price for benefit.
CMB Sanctions for Market Manipulation
The CMB has broad supervisory and enforcement powers. Sanctions may include administrative fines, temporary or permanent trading bans, restrictions on market access, reporting obligations, public announcements, criminal complaints, and measures against investment institutions or market participants.
The CMB’s official communiqué list includes the Communiqué on Market Abuse, the Communiqué on Obligation of Notification Regarding Insider Trading or Manipulation Crimes, and the Communiqué on Measures to Be Taken for Insider Trading and Manipulation Investigations. These instruments show that market manipulation enforcement is supported by both substantive rules and procedural mechanisms.
In practice, the CMB may analyze trading records, account relationships, order patterns, timing of social media posts, price and volume movements, communications between suspects, beneficial ownership structures, IP addresses, and links between accounts. If suspicious conduct is detected, the Board may impose administrative measures and may also refer the matter to criminal authorities.
Trading Bans and Market Access Restrictions
One of the most practical CMB measures is a trading ban or restriction. A trading ban may prevent a person from trading in certain securities or in the market generally for a specified period. This is a significant sanction because it directly affects the person’s ability to participate in the market.
The Market Abuse Communiqué states that if a person prohibited from trading by a Board decision trades in exchange or other organized markets using their own account or another person’s account during the prohibition period, this conduct is deemed a market abuse action.
This means that a trading ban cannot be avoided by using relatives, friends, nominee accounts or controlled entities. If a banned person continues trading indirectly, the conduct may create additional liability. Brokerage firms should also be careful because they may be expected to detect suspicious account use or account relationships.
Administrative Fines and Financial Consequences
Administrative fines may be imposed for market abuse actions and other violations of capital market rules. The amount and legal basis depend on the specific violation, the applicable provision, the benefit obtained, recurrence, market impact and other circumstances.
Financial sanctions serve two functions. First, they punish unlawful conduct. Second, they deter future misconduct. In market manipulation cases, deterrence is especially important because unlawful gains may be substantial. If the sanction is insignificant compared with the profit, manipulation may continue.
Recent public discussion in Turkey has emphasized stronger enforcement against manipulation. In November 2025, Reuters reported that Turkish authorities were considering tougher penalties and new regulations against market manipulation, particularly in relation to certain investment funds, and that possible measures discussed included higher fines and even cancellation of portfolio management licenses.
Although legislative and regulatory changes must always be verified from official sources before legal action, this public enforcement trend shows that manipulation remains a priority issue for Turkish regulators.
Criminal Proceedings and CMB Complaints
Market manipulation may lead to criminal proceedings. The CMB may file a criminal complaint with the public prosecutor where it identifies conduct that may constitute manipulation under Article 107. The criminal court will then assess whether the legal elements of the offence are established.
Criminal liability requires proof beyond administrative suspicion. In transaction-based manipulation, the court examines whether the trading activity was designed to create a false or misleading impression. In information-based manipulation, the court examines whether false or misleading information was provided or disseminated with the purpose of affecting prices, values or investor decisions, and whether a benefit was obtained.
Evidence is crucial. Trading data, order logs, account histories, messages, phone records, social media posts, relationships between accounts, profit calculations, market conditions and expert reports may all be relevant. In many cases, financial experts are needed to evaluate whether price and volume movements were natural or artificial.
Civil Liability Toward Investors
Market manipulation may also create civil liability. Investors who suffered losses because of manipulative conduct may seek compensation, depending on the facts and available evidence. A civil claim may require proof of unlawful conduct, damage, causation and fault or statutory responsibility.
For example, if investors bought shares at an artificially inflated price due to a pump-and-dump scheme and suffered losses when the price collapsed, they may argue that the manipulators caused their damage. However, such claims can be complex. The investor must show a connection between the manipulation and the investment loss.
CMB findings, criminal investigation files, expert reports, trading records and public disclosures may support civil claims. Investors should preserve all evidence, including account statements, order records, screenshots of misleading posts, group messages, broker communications and KAP disclosures.
Liability of Brokerage Firms
Brokerage firms may also face regulatory or civil consequences if they facilitate manipulation, fail to detect suspicious activity, ignore unusual trading patterns, or provide services to persons subject to trading bans. Their liability depends on their role, knowledge, internal controls and regulatory obligations.
Brokerage firms are not automatically liable for every manipulative act committed by a customer. However, they are expected to maintain compliance systems, monitor suspicious transactions, preserve records and cooperate with regulatory authorities. If a brokerage firm knowingly assists manipulation or fails to act despite clear warning signs, liability risk increases.
Examples of red flags include coordinated trading between related accounts, repeated orders with no economic rationale, rapid price-moving transactions in illiquid securities, suspicious order cancellations, trading immediately before misleading social media campaigns, or use of accounts by a person subject to a trading ban.
Liability of Public Companies and Executives
Public companies and their executives may also become involved in manipulation risks. Misleading public statements, selective disclosure, false special event disclosures, overly optimistic announcements, concealed material facts or coordinated communication with market actors may trigger regulatory scrutiny.
The Market Abuse Communiqué includes acts related to inside information or continuous information. Public companies must therefore ensure that material disclosures are accurate, complete and timely. A false or misleading KAP announcement may affect investor decisions and market prices.
Executives should be cautious when speaking to media, analysts, shareholders or investor groups. Even informal statements may create market impact. If a statement is misleading and connected with trading benefit, information-based manipulation risk may arise.
Pump-and-Dump Schemes in Turkey
Pump-and-dump schemes are among the most common manipulation patterns. The manipulator first accumulates shares, often in a low-liquidity company. Then positive rumors, exaggerated claims or false information are spread. Retail investors buy the stock as demand increases. The manipulator sells at inflated prices, and the price eventually collapses.
Such schemes may involve both transaction-based and information-based elements. Artificial trading may create the appearance of demand, while misleading posts or reports may influence investor decisions. Where multiple persons act together, account relationships and communication records become very important.
Retail investors should be especially cautious with small-cap stocks that suddenly become popular on social media without clear fundamental news. Rapid price increases combined with aggressive online promotion may indicate manipulation risk.
Short Selling, False Signals and Market Manipulation
Short selling itself is not necessarily unlawful when conducted within the applicable rules. However, short selling may become problematic if it is combined with false rumors, misleading information, coordinated selling, artificial order activity or failure to comply with short-sale rules.
Market manipulation may occur in both upward and downward directions. A manipulator may pump a stock upward before selling, or may spread negative rumors to push the price down before covering short positions. Both strategies can harm investors and distort price formation.
Brokerage firms and institutional investors should ensure that short-selling activities comply with applicable CMB and Borsa İstanbul rules. Public statements made while holding short positions should be carefully reviewed for accuracy and conflict disclosure.
Insider Trading and Manipulation
Market manipulation and insider trading are different legal concepts, but they may overlap in practice. Insider trading involves misuse of non-public, price-sensitive information. Manipulation involves conduct designed to create false or misleading price, value or investor decision effects.
A person may commit both offences if they trade on inside information and also spread misleading information or coordinate artificial trading. For example, a person who knows undisclosed negative information may sell shares and simultaneously spread false positive rumors to keep the price high. Such conduct may trigger multiple legal risks.
The CMB’s communiqué list includes separate regulations concerning market abuse, notification obligations regarding insider trading or manipulation crimes, and measures for insider trading and manipulation investigations.
Digital Platforms, Influencers and Investment Groups
Digital platforms have changed the enforcement landscape. Influencers, analysts, Telegram channel operators, YouTube commentators and paid subscription group administrators may affect investor behavior. If their content includes false or misleading information designed to affect prices or investor decisions, they may face manipulation allegations.
The risk increases when the person has undisclosed positions in the securities discussed, receives payments from interested parties, coordinates with traders, gives specific target prices without basis, uses phrases creating urgency, or deletes messages after the price movement.
Content creators should separate financial education from investment direction. They should disclose conflicts, avoid guaranteed return statements, verify information before publication and avoid coordinating trading activity. Investors should remember that popularity on social media is not a license from the CMB.
Defenses and Legal Assessment in Manipulation Cases
Every suspicious market movement is not manipulation. Markets are volatile by nature. Prices may rise or fall due to news, liquidity, macroeconomic conditions, investor sentiment, sector developments or legitimate speculation. Therefore, each case must be assessed based on evidence.
Possible defenses may include legitimate economic rationale, independent trading decision, absence of intent, absence of misleading information, lack of benefit, reliance on public information, journalistic activity, research-based analysis, or compliance with market rules. However, these defenses depend heavily on documents and trading data.
A person accused of manipulation should avoid informal explanations and immediately preserve evidence. Legal counsel should review account records, communications, trading chronology, public disclosures and possible relationships with other accounts. In manipulation cases, early evidence management is critical.
Practical Compliance Recommendations for Investors
Investors should avoid participating in coordinated trading groups. They should not buy or sell securities based solely on rumors, anonymous social media posts or claims of inside information. They should be cautious of guaranteed return promises and sudden campaigns around illiquid shares.
Investors should review official disclosures through KAP, company financial statements and licensed investment institution research. They should also verify whether persons providing advice are authorized. If they are harmed by suspected manipulation, they should preserve screenshots, messages, transaction records and account statements.
An investor should also be careful not to become part of a manipulation scheme unintentionally. Reposting false claims, encouraging coordinated purchases or using multiple accounts to influence price may create legal risk.
Practical Compliance Recommendations for Companies
Public companies should adopt strict disclosure policies. All material information should be disclosed through proper channels. Executives should avoid selective disclosure and should not share material information with favored investors or market groups.
Companies should monitor rumors affecting their securities. If false information spreads in the market, the company may need to make a clarification disclosure depending on the circumstances. Investor relations teams should be trained to communicate accurately and consistently.
Directors and executives should also observe trading restrictions. Trading before material disclosures or while possessing inside information may trigger insider trading and market abuse concerns.
Practical Compliance Recommendations for Brokerage Firms
Brokerage firms should maintain surveillance systems for suspicious trading. They should monitor unusual price-volume movements, related account trading, order cancellations, wash trades, rapid accumulation and liquidation patterns, and accounts linked to persons subject to trading bans.
They should also maintain strong recordkeeping. Order logs, customer instructions, phone recordings, electronic communications and account opening records may become critical in CMB investigations or court proceedings.
Customer representatives should not participate in rumors or encourage speculative campaigns. Research departments should maintain independence and disclose conflicts where required.
Conclusion
Market manipulation in Turkey is a serious legal violation with severe consequences. Under Capital Markets Law No. 6362, manipulation may be transaction-based or information-based. Transaction-based manipulation involves trades, orders, order cancellations, order changes or account movements designed to create a false or misleading impression regarding price, supply or demand. Information-based manipulation involves false, misleading or deceptive information, rumors, comments or reports intended to affect prices, values or investor decisions.
The legal consequences may include imprisonment, judicial fines, administrative fines, trading bans, CMB measures, criminal complaints, civil liability and reputational damage. The CMB’s enforcement framework is supported by the Market Abuse Communiqué and related regulations concerning notification obligations and investigation measures.
In the digital age, manipulation risks have expanded. Social media, Telegram groups, WhatsApp communities, online forums, influencers and digital trading platforms may all be used to influence investors unlawfully. Investors should rely on official disclosures and licensed institutions, not rumors or guaranteed-profit promises.
For companies, brokerage firms, executives, investors and content creators, compliance is essential. Market manipulation law is not limited to professional traders. Any person who creates misleading market impressions, spreads false information for benefit, or participates in coordinated manipulative activity may face serious sanctions.
In conclusion, Turkish market manipulation rules are designed to protect investors, preserve fair price formation and maintain confidence in capital markets. Any person or institution facing a CMB investigation, trading ban, manipulation allegation, investor claim or criminal complaint should obtain professional legal advice immediately, because early evidence analysis and correct procedural strategy may determine the outcome of the case.
Yanıt yok