I was thinking about putting some money on stock and selling it later to make a small profit. It is called swing trade, I believe.
I know that this kind of thing is highly shady regarding what is moral and what is not.
The investiment would be in a real industry, and not banking, finance, etc.
It this a moral practice?
Any help would be appreciated.
Yes, it is perfectly morally acceptable.
There is nothing sinful, in and of itself, about making a profit. Actually I see this question come up more than you'd expect in traditional Catholic circles, and --- I don't mean to sound condescending in saying this --- I have to suspect it comes from younger people, who have studied the Catholic Faith, but don't have a lot of experience in the real world, and reason that it might be immoral to buy something at a lower price and sell it at a higher price. My own son asked me this question not long ago. The reasoning seems to be that you are somehow cheating, that you shouldn't benefit from having had the resources and the opportunity to buy low and sell high, when the other guy had neither one of those things, IOW, you got a better deal than he's going to get, and possibly you are sinning by not passing on the same deal to the other guy.
This is nothing to worry about. First of all, people's circuмstances, the relative availability of opportunities, and the resources they have, change all the time. You also have a right to be reimbursed for your entrepreneurship, having invested time, money, and effort into the thing that is going to make you the profit, very often having taken the chance that your own investment will go sour --- what if you buy 100 widgets and can't sell them? --- and transferring ownership to the other person for a mutually agreeable price.
That's just the nature of business and commerce, and there's nothing wrong with it.