Meaning of “insider information” in the English Dictionary

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"insider information" in Business English

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insider informationnoun [ U ]

uk us also inside information

WORKPLACE, FINANCE important information about a company or organization that is known only to the employees of the company or organization and not to the public:

No one knows what stock prices will do short-term, unless they are acting on illegal insider information.

(Definition of “insider information” from the Cambridge Business English Dictionary © Cambridge University Press)