insider trading

American  

noun

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

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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.

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Discover More

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

Other Word Forms

• insider trader
  noun

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Etymology

Origin of insider trading

First recorded in 1965–70

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Example Sentences

See Examples For:

insider trading

He is accused of violating Kalshi’s rules regarding insider trading and market manipulation, fining him more than $71,000.

From Salon ● Aug. 31, 2026

A spokesperson for Kalshi, one of the leading trading platforms, said the platform bans insider trading and welcomes any policy measures doing the same.

From Los Angeles Times ● Aug. 12, 2026

The potential for insider trading to occur has also been raised.

From BBC ● Aug. 4, 2026

Prediction markets have faced increasing scrutiny in the United States over insider trading allegations, and are banned in some other countries.

From Barron's ● Jul. 16, 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

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