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Synonyms

insider trading

American  

noun

  1. the illegal buying and selling of securities by persons acting on privileged information.

insider trading Cultural  

  1. The unlawful practice of using information that comes from a source “inside” the business but is not available to the general public to trade on the stock market. This activity is prohibited by law and is policed by the Securities and Exchange Commission.

Discover More

In the mid-1980s, several revelations of insider trading rocked Wall Street.

Other Word Forms

  • insider trader noun

Etymology

Origin of insider trading

First recorded in 1965–70

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

None of the US financial authorities contacted by the BBC acknowledged any of the allegations of insider trading.

From BBC • Apr. 19, 2026

He said the firm would adopt tough policies to tackle insider trading.

From MarketWatch • Apr. 1, 2026

Can you lay out your case for this being more than insider trading?

From Slate • Mar. 31, 2026

Earlier this week, Polymarket said it was beefing up its rules against insider trading, prohibiting users from trading on stolen confidential information or illegal tips.

From The Wall Street Journal • Mar. 26, 2026

Paolo’s father was a real estate mogul who had been indicted for insider trading some months ago.

From "Genuine Fraud" by E. Lockhart

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.