Manipulation: Definition, Methods, Types, and Example

What Is Manipulation?

Market manipulation is conduct designed to deceive investors by controlling or artificially affecting the price of securities. Manipulation is illegal in most cases, but it can be difficult for regulators and other authorities to detect and prove.

Market manipulation may involve factually false statements as well, but it always seeks to influence prices in order to mislead other market participants.

Key Takeaways

  • Market manipulation aims to mislead other market participants.
  • Manipulation is hard to detect and prove, but it's also harder to execute in the larger and more liquid markets.
  • Two common types of stock manipulation are the pump-and-dump and the poop-and-scoop.
  • Currency manipulation is a distinct political claim typically made in trade disputes between sovereign countries.

Click Play to Learn What Market Manipulation Is

Manipulation Methods

Manipulation is more difficult for the more liquid, or widely traded securities. It is much easier to manipulate a penny stock with a tiny typical daily trading volume than the share price of a large-cap company with daily turnover valued in billions of dollars.

The pump-and-dump is a market manipulation often used to artificially inflate the price of a microcap stock before selling it. Less common is the inverse poop-and-scoop scheme, in which false derogatory statements are made about a stock in order to buy it on the cheap. There's also the short-and-distort variety, essentially a poop-and-scoop executed by short-sellers in order o profit.

While such schemes rely primarily on promotion or factual misstatements they are often supplemented by illegal trading tactics designed to deceive.

One common means is order spoofing, which involves the placing of numerous buy or sell orders designed to move the price of the stock, then canceling them once other traders have moved their own bids or asks accordingly. Order spoofing has tempted staff at large Wall Street firms alongside shady daytraders, and can take place in the bond and metals markets as well as in the stock market.

Currency Manipulation

Currency manipulation is an accusation often levied in trade or exchange rate disputes, notably by the U.S. against trading partners who are sometimes alleged to set the exchange rate of their currency against the U.S. dollar artificially low to boost exports. Governments and central banks can be accused of currency manipulation if they fix the exchange rate or seek to affect it less openly with market transactions from time to time.

Currency manipulation is a political term rather than a legal one because foreign exchange policies are set by sovereign countries. Currencies are fixed or allowed to float for a variety of internal and external motives, while currency manipulation claims are almost always the result of dissatisfaction with trade flows. As a result, whether a currency manipulation is taking place or not is often a subjective judgement.

The U.S. Treasury makes a semiannual report to Congress on the macroeconomic and foreign exchange policies of major U.S. trading partners in accordance with the Omnibus Trade and Competitiveness Act of 1988. The report uses evaluation criteria spelled out in the Trade Facilitation and Trade Enforcement Act of 2015. The December 2021 report concluded no major U.S. trading partner manipulated its currency's exchange rate against the U.S. dollar to gain an unfair competitive advantage in international trade, while singling out Vietnam and Taiwan for additional scrutiny.

Currency manipulation is a political claim rather than an illegal market deception.

Example of Currency Manipulation Claim

On August 5, 2019, the People's Bank of China (PBOC) set the Chinese yuan’s daily reference rate above 7 yuan per dollar for the first time in over a decade, depreciating the Chinese currency against the dollar and making Chinese exports cheaper in dollar terms. The rate was set after the announcement by the Trump administration of new tariffs of 10% on $300 billion worth of Chinese imports, which went into effect Sept. 1, 2019.

The same day the yuan exchange rate topped 7 per dollar, the Trump administration labeled China a currency manipulator, a designation lifted a few months later. The tariffs on Chinese exports, however, remained in place as of January 2022.

Article Sources
Investopedia requires writers to use primary sources to support their work. These include white papers, government data, original reporting, and interviews with industry experts. We also reference original research from other reputable publishers where appropriate. You can learn more about the standards we follow in producing accurate, unbiased content in our editorial policy.
  1. U.S. Securities and Exchange Commission. "Market Manipulations and Case Studies," Page 4. Accessed Feb. 18, 2022.

  2. Nasdaq. "5 Market Manipulation Tactics and How to Avoid Them." Accessed Feb. 18, 2022.

  3. U.S. Securities and Exchange Commission. "SEC Charges California Day Trader for Manipulative Trading."

  4. U.S. Securities and Exchange Commission. "J.P. Morgan Securities Admits to Manipulative Trading in U.S. Treasuries."

  5. Congressional Research Service. "Exchange Rates and Currency Manipulation."

  6. AP. "IMF Contradicts Trump: China Hasn’t Manipulated Its Currency." 

  7. Project Syndicate. "The Currency Manipulation Game."

  8. U.S. Treasury. "Treasury Releases Report on Macroeconomic and Foreign Exchange Policies of Major Trading Partners of the United States."

  9. BBC. "Trump Escalates Trade War With More China Tariffs."

  10. U.S. Treasury. "Treasury Designates China as a Currency Manipulator,"

  11. The New York Times. "U.S. Says China Is No Longer a Currency Manipulator."

  12. CNN. "Why Biden Is Keeping Trump's China Tariffs in Place."

Open a New Bank Account
The offers that appear in this table are from partnerships from which Investopedia receives compensation. This compensation may impact how and where listings appear. Investopedia does not include all offers available in the marketplace.