There are many laws that people who work in a publicly traded company have to follow. These are meant to ensure that there isn't anything illegal going on that could harm shareholders or the general public. One of the actions that is forbidden is insider trading. This has to do with a person with intimate knowledge of a company using that information to make decisions about their own personally held shares in the company. It is also meant to prevent these individuals from passing their knowledge on to others who have shares.
Let us say you are a contractor who has experience with Department of Transportation regulations. Your name came up in connection with a pretexting scheme that is under investigation.
House flipping is the practice of buying properties and reselling them quickly for profit. If done correctly, this technique is entirely ethical.