insider
- 01 C1 Advanced
someone who works for a company and uses private information to buy or sell its stocks.
a person, such as a director or executive, who has access to non-public, price-sensitive information about a corporation.
Simple“The government is investigating him for illegal insider trading.”
In context“Regulatory bodies monitor unusual market activity to detect whether an insider is profiting from non-public information regarding upcoming quarterly results.”
“BBC Sport's Chelsea reporter Nizaar Kinsella says insiders insist the chance will be gone and Fernandez will stay until next summer, if City do not make their move on Friday.”
“Insiders at the biggest social media companies have previously told me how posts triggering a strong reaction are more likely to go viral.”
From inside + -er.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.