Example: I discuss a movie with a friend. I really like the movie. But I also have stocks of the company that made the movie.
Should I mention to the friend that I have stocks of that company? Talking about money/stocks gives the impression that I have much money (which I don't), also it looks like my feedback/opinion about the product isn't honest.
On the other side, not mentioning that I have stocks could get interpretated as try to "sell" them bad stuff just because I have stocks of the company.
If its relevant: I don't own much stocks of said company (less than 0.01‰ of all stocks).