Share prices go up and down for various reasons. In this case, it may mean that the company has increased sales at the expense of it's competitors, so I would not expect it to have the same effect on the competitors; maybe the opposite.
I hope your professor didn't write this question because it's stupid.
What do you mean by "stocks going up on a beer company?" Do you mean one beer company's stock is going up?
What positive and negative effects ON WHOM? The stockholder? The company? The customer?
Only you know the context of your class and we aren't going to do your homework for you anyways.
This is not the home line
what effect would stocks going up on a beer company have on the market. Would other beer company go up also? what positive and negative effects would this have?