Is it illegal to appear in an ad for a company that you have stocks in?

It seems like there;s a conflict of interests there. Appearing in an ad for a company you have stocks in, in order to raise the price of the stocks, seems like it should be illegal. It is like generating money from nowhere. With your face and a little psychology in your ad, you can precisely adjust the price of... show more It seems like there;s a conflict of interests there. Appearing in an ad for a company you have stocks in, in order to raise the price of the stocks, seems like it should be illegal. It is like generating money from nowhere. With your face and a little psychology in your ad, you can precisely adjust the price of your own stocks.
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