What is Manipulation in the Stock Market?

Key Highlights

• Market manipulation is the intentional and artificial manipulation of supply and demand to influence a stock’s price.
  
• Manipulators benefit when other investors buy or sell securities whose price has been manipulated.
  
• Rumours and fake transactions are used to manipulate the price of securities.
  
• A number of scams can deceive regular investors. So, they frequently don’t get their money back.
  

Ever wondered what market manipulation really means?

It refers to deliberately misleading investors by manipulating the supply or demand of an asset to drive its price up or down artificially. The manipulators aim to profit from these price shifts, and such activities can often be difficult to detect.

Identifying market manipulation is challenging for authorities like the Securities and Exchange Board of India (SEBI). There is a gap in the ability to identify market manipulation since too many other factors influence the price of assets. This makes it hard to measure them. However, if SEBI finds evidence of market manipulation, the involved parties may be penalised. There can be a ban from the securities market, jail, or hefty fines.

How does Market Manipulation Work?

The stock market can be manipulated in different ways. For example, someone might place many small orders at prices below the current market rate. This can push the asset’s price down, making investors think there’s something wrong with the stock. As a result, they may start selling their shares, causing the price to drop even further.

Another method is to place an equal number of buy and sell orders for the same asset through different brokers at the same time. These orders cancel each other out but create the illusion of high trading activity. Seeing this, investors may believe there’s strong interest in the asset and expect its price to rise. They start buying, which pushes the stock price up.

Examples of Market Manipulation

Let’s look at some real-life examples of manipulation in the stock market.

• The Satyam Computer Services scam: Indian IT firm Satyam Computer Services overstated its profits by ₹7,800 crore (about US$1 billion). Founder Ramalinga Raju confessed to falsifying the company’s accounts. Following this, a new chairman was brought in to restore investor confidence and stabilise the business.

• The Unitech scam: A primary Indian real estate developer named Unitech Group was accused in 2015 of transferring money to shell companies. Ultimately, the promoters of Unitech were barred by SEBI from the securities market for a decade.

• Suman Poddar case: In 2018, Suman Poddar exploited penny stocks to claim bogus Long-Term Capital Gains (LTCG). He inflated prices via circular trading, held stocks for over a year, then sold at inflated prices to convert unaccounted income into tax-free gains. SEBI and the Income Tax Department flagged this as a case of LTCG misuse.

• Jane Street Derivatives Manipulation: In 2025, US-based Jane Street allegedly manipulated Indian derivatives markets using high-frequency trading. SEBI froze ₹4,844 crore in gains it considered unlawful and imposed trading restrictions. The case prompted calls for tighter surveillance and highlighted gaps in India’s oversight of advanced trading strategies.

• Harshad Mehta scam: In 1992, Harshad Mehta exploited loopholes in the banking system by using fake bank receipts to access funds worth around ₹3,500 crore. He pumped this into stocks like ACC, pushing prices higher. When the scam unravelled, the Sensex fell sharply, wiping out investor capital and prompting significant reforms in SEBI’s regulatory powers.

Methods of Market Manipulation

The following are some popular ways of stock manipulation.

1. Spoofing: It refers to the practice of placing fake orders and then cancelling them before they are carried out. Investors look at the pending buy and sell orders to determine if the market is bullish or bearish on a stock. Therefore, spoofing might give these investors the impression that there is significant interest in the market. However, in reality, there isn’t. The fake orders convince actual buyers or sellers to act in a particular way. Thus, the spoofer profits.

2. Wash Trades: These are fake trades designed to mislead the market, not to actually buy or sell shares. In a wash trade, the same trader might place both buy and sell orders for the same asset, sometimes using different brokers. In some cases, a trader and broker may coordinate to carry them out. Wash trades can also occur in derivatives markets. The purpose is to create the illusion of market activity on one side — but in reality, no genuine trading is taking place.

3. Pump and Dumps: The manipulator first buys a large number of a company’s shares. Then, they spread positive — often false — news to attract investors and drive up the price. Once the price climbs, they sell their shares for a profit. This tactic is common with small-cap or micro-cap stocks, where prices are easier to influence, and it often targets retail investors who are more vulnerable to such schemes.

4. Painting the Tape: This term comes from the days when ticker tape recorded stock trades. It involves manipulators trading a security among themselves — often with a partner making matching countertrades — to create the illusion of high market interest. The aim is to trick investors into buying, which pushes the price up. When done at the end of the trading day to influence the closing price, it’s called “marking the close.”

5. Bear Raids: A “bear raid” occurs when a manipulator initiates a short position in a company and then makes critical remarks about it. It is also known as a “short attack” or “stock bashing.” This strategy aims to make investors sell their shares in a panic, which lowers the stock’s price. Even if the manipulator gave false information, the goal is still to close their short positions at cheaper prices and make a profit.

How to Prevent Market Manipulation

Now that you know what is market manipulation, let’s look at some ways it can be prevented:

• Real-time surveillance systems

Market regulators must deploy advanced real-time surveillance systems that constantly monitor trades, order books, and unusual price movements. These systems help detect suspicious activities like spoofing, layering, or quote stuffing. Additionally, using AI-powered alerts and forensic data analysis enhances the capability to trace market abuse as it unfolds, allowing timely action.

• Stringent insider trading regulations

Insider trading is when someone buys or sells shares using unpublished, price-sensitive information that the public doesn’t know yet. Strong regulations make this illegal and ensure a fair market. These rules require company insiders to disclose important information and sometimes wait through a “cooling-off” period before trading if a major announcement is coming. Regulators may also monitor communications between company executives and outside analysts to prevent leaks. Anyone caught breaking these rules can face heavy fines, trading bans, or other legal action.

• Audit trail maintenance

All exchanges should keep a detailed, unchangeable record of every trade and order modification. This record must include timestamps, trader identities, IP addresses, and the algorithms used. In the event of unusual price movements, investigators should be able to quickly trace the activity. Audit trails must be stored securely and remain readily accessible to regulatory authorities to support timely investigations and enforcement.

• Algorithmic trading controls

To curb manipulation via high-frequency trading, exchanges must impose strict controls on trading algorithms. Each algorithm must be registered with the exchange and tested for compliance before deployment. Circuit breakers should be set to freeze trading if abnormal patterns such as rapid cancellations or self-trading are detected. Exchanges must also ensure these algorithms are not designed to create misleading demand or disrupt price discovery through excessive order volume.

• Whistleblower incentives

Creating strong legal protection and offering financial incentives for whistleblowers can be highly effective in uncovering market manipulation. How can employees who witness unethical practices feel safe to speak up? Whistleblower programmes provide a confidential platform for reporting such misconduct.

• Position limits and margin controls

To curb speculative excess and prevent price distortion, regulators should enforce position limits and tighten margin requirements. Position limits cap the maximum exposure a trader can hold in a specific security, reducing the risk of cornering the market. Tightening margin requirements during periods of high volatility helps reduce over-leveraging and discourages manipulative practices aimed at artificially moving prices.

• False news monitoring

Dissemination of fake or misleading news can severely influence market prices. Regulators must collaborate with digital platforms and media houses to monitor and flag false information related to public companies or market events. Automated sentiment analysis tools should be deployed to detect manipulative narratives. Companies must report market-sensitive news through verified channels, and platforms should face penalties for hosting unverified market-moving content.

Conclusion

Market manipulation is the deliberate interference with normal trading to gain unfair profits. It can take many forms — from spoofing and pump-and-dump schemes to stock bashing and bear raids — but all share the same goal: to mislead investors and distort prices.

While such practices are illegal, they still occur in various guises and often unfold quickly to exploit investor impatience or inexperience. Recognising the warning signs is your best defence. By understanding how manipulation works and staying alert to unusual trading patterns, false news, or sudden price swings, you can make more informed decisions and better protect your investments.