3.9 Market Manipulation

Securities Industry Essentials SIE

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1 Introduction

About the SIE Exam How to Use This Course

2 Chapter 1: Knowledge of Capital Markets

1.1 Regulatory Bodies 1.2 State Regulation 1.3 Market Participants 1.4 Types of Markets 1.5 The Exchanges 1.6 OTC Markets 1.7 Economic Policies 1.8 Interest Rates 1.9 Business Cycles 1.10 International Economics

3 Chapter 2: Understanding Products and Their Risks

2.1 Common Stock Basics 2.2 Corporate Actions 2.3 Preferred Stock 2.4 ADRs 2.5 Bond Basics 2.6 Yields 2.7 U.S. Treasury Securities 2.8 Corporate Bonds 2.9 Municipal Bonds 2.10 Money Market Instruments 2.11 Options Basics 2.12 Hedging Strategies 2.13 Mutual Funds 101 2.14 Mutual Fund Fees 2.15 ETFs 2.16 UITs & REITs 2.17 DPPs 2.18 Systematic Risk 2.19 Non-Systematic Risk 2.20 Mitigation Strategies

4 Chapter 3: Trading, Customer Accounts and Prohibited Activities

3.1 Order Types 3.2 Trade Settlement 3.3 Quoting 3.4 Account Types 3.5 Account Registration 3.6 Retirement Plans 3.7 Education Savings 3.8 AML Rules 3.9 Market Manipulation 3.10 Insider Trading 3.11 Customer Protection

5 Chapter 4: Overview of Regulatory Framework

4.1 Registration 4.2 Continuing Education 4.3 Employee Conduct 4.4 Correspondence

3.9 Market Manipulation

Key Takeaways Explain This Topic AI

Market manipulation involves artificially influencing security prices or trading volume and is prohibited under the Securities Exchange Act and FINRA rules

Wash trading creates the illusion of market activity by simultaneously buying and selling the same security with no real change in beneficial ownership

Pump and dump schemes artificially inflate stock prices through false promotion, then sell at inflated prices leaving innocent investors with devalued stock

Spoofing and layering involve placing non-bona fide orders with intent to cancel before execution to manipulate other traders' behavior

Front running is trading ahead of a known customer order to profit from the expected price movement, which is a breach of fiduciary duty

Last updated: January 2026

Market manipulation involves artificially influencing security prices or trading volume. These practices are illegal under federal securities laws and FINRA rules.

What is Market Manipulation?

Market manipulation is any conduct designed to deceive investors by artificially affecting the price or volume of a security.

Why It's Prohibited
Undermines market integrity
Harms innocent investors
Destroys confidence in fair markets
Creates artificial prices that don't reflect true value
Types of Market Manipulation
Wash Trading

Wash trading involves buying and selling the same security to create the illusion of market activity.

Element Description
Definition Simultaneously buying and selling the same security
Purpose Create appearance of active trading
Result No change in beneficial ownership
Violation Securities Exchange Act, FINRA Rules

Example: A trader sells 1,000 shares to a related account and immediately buys them back, creating artificial volume.

Matched Orders

Matched orders are prearranged trades between parties with no real change in ownership.

Orders entered knowing a matching opposite order exists
Creates misleading appearance of active trading
Often used with wash trades
Painting the Tape

Painting the tape involves executing a series of transactions to create the impression of active trading.

Element Description
Definition Transactions creating misleading activity appearance
Purpose Attract other investors to trade
Name Origin From ticker tape showing trade activity

Note: Painting the tape and matched orders often work together to manipulate prices.

Pump and Dump

Pump and dump schemes artificially inflate a stock's price through false promotion, then sell at the inflated price.

Phase Action
Pump Spread false positive information to inflate price
Dump Sell shares at artificially high prices
Result Innocent investors left holding devalued stock
Spoofing and Layering

Spoofing involves placing orders with the intent to cancel before execution.

Element Description
Definition Placing non-bona fide orders to move prices
Intent Cancel before execution
Purpose Manipulate other traders' behavior

Layering is a form of spoofing where multiple orders are placed at different price levels:

Place large orders on one side of the market
Execute smaller order on opposite side at better price
Cancel the large orders

Example: Place large sell orders to push price down, buy at lower price, cancel sell orders, price rises.

Front Running

Front running is trading ahead of a customer order to profit from the expected price movement.

Element Description
Definition Trading ahead of known customer order
Who Broker-dealer or representative
Purpose Profit from price impact of customer order
Violation Breach of fiduciary duty

Example: A broker learns a client will buy 100,000 shares. Before executing the client's order, the broker buys shares for their own account, knowing the large order will push the price up.

Marking the Close/Open

Marking the close (or open) involves placing trades near market close (or open) to influence the closing (or opening) price.

Type Description
Marking the Close Trades at end of day to affect closing price
Marking the Open Trades at start of day to affect opening price

Why it matters: Closing prices are used for:

Portfolio valuations
Index calculations
Options settlement
Performance benchmarks
Churning (Excessive Trading)

Churning is excessive trading in a customer's account to generate commissions.

Element Description
Definition Excessive trading for commission generation
Control Broker must have control over account
Intent Generate commissions, not serve customer
Harm Costs eat into customer's returns
Backing Away

Backing away is a market maker's failure to honor a published quote.

Element Description
Definition Refusing to trade at quoted price and size
Who Market makers
Rule Must honor firm quotes

Exception: Quotes can be updated as market conditions change, but must honor quote when order is received at displayed price/size.

Spreading False Information
Market Rumors

Spreading false or misleading information to affect security prices is prohibited:

False press releases
Misleading social media posts
Fabricated research reports
Fake news about companies
Scalping

Scalping involves recommending a security while secretly selling it.

Example: An analyst publicly recommends buying a stock while simultaneously selling their own position.

Regulatory Framework
Key Laws and Rules

Rule/Law Focus
Securities Exchange Act Section 9(a) Prohibits manipulation
SEC Rule 10b-5 Fraud and manipulation
FINRA Rule 2020 Manipulative and deceptive devices
FINRA Rule 2010 Standards of commercial honor
FINRA Rule 5210 Publication of transactions and quotations
FINRA Surveillance

FINRA monitors for manipulation through:

Trade surveillance systems
Pattern detection algorithms
Cross-market analysis
Tips and complaints
Consequences of Market Manipulation

Type Potential Penalty
Civil SEC fines, disgorgement of profits
Criminal Imprisonment, criminal fines
Regulatory FINRA suspension or bar
Private Investor lawsuits
Red Flags for Manipulation

Category Warning Signs
Trading Patterns Unusual volume, price spikes
Order Flow Large orders cancelled repeatedly
Timing Activity concentrated at open/close
Communications Promotional campaigns before price moves
Key Takeaways
Market manipulation is illegal and harms investors
Wash trading creates false appearance of activity
Pump and dump artificially inflates then crashes prices
Spoofing/layering involves placing orders to cancel
Front running profits from customer order knowledge
Churning generates excessive commissions
Penalties include fines, imprisonment, and industry bars