Those people are all in trouble because it's illegal to trade on insider information and they tracked them all down.

所有人都惹上了麻烦,因为内幕交易是非法行为,全部人都被捕了

耶鲁公开课 - 金融市场课程节选

You would be exploiting insider information and you would be victimizing the outsiders.

利用内幕消息获取利益,就会使局外人承受损失

耶鲁公开课 - 金融市场课程节选

An insider is someone who is privy to the secret information of a company and the secret information could be used to trade.

局内人掌握着公司内幕信息,这些内幕信息可以助你在交易中获利

耶鲁公开课 - 金融市场课程节选