I invested in the stock NYSE:CC but it has been dropping for no reason. I am thinking it may be because of Trump's ban on foreign investment but doesn't that only apply to tech companies? This is a chemical company. The price dropped by 4% yesterday and hasn't rebounded. Should I be concerned?
No, you should not be concerned.
How long have you held this stock? How often do you check its price?
This is within the normal variation of a stock price. If you buy it at say $50 you cannot expect to see it consistently climb to $51, $52, $53. It will bounce around within ~10% or so for a variety of small reasons, few of which affect the long term price of the stock.
If you're concerned about the short-term price of the stock instead, perhaps you should reconsider your investment strategy. If you want to sell your stocks to buy something within 3-5 years, you might want a safer investment like a CD. If you are thinking of selling now, DON'T. The concern you are expressing is not bad (at some point cutting your losses makes sense if the company is failing) but it is a very expensive concern. You'll always be buying when things are going well (high price) and selling when they are not going well (low price).
If you are investing for 5+ years, might I suggest an index fund? Something that tracks the whole market instead of one company. Unless you work for the chemical company you shouldn't have more than 5% of your investments in that one company.
Stock prices don't change for "no reason". There is a reason. You may not know what that reason is, but that's not the same thing as there being no reason.
Stock prices bounce around all the time for many reasons. If you're a typical amateur investor, watching the price of your stocks every day can be a real roller coaster ride. If seeing the price go down one day, or for a couple of days in a row, causes you to panic, I think you're better off to just not check the price so often. Think longer term.
The stock market routinely falls when there is economic uncertainty. Right now the Trump administration is trying to renegotiate trade deals with various other countries. This makes the markets nervous. Trump MIGHT succeed in pressuring other countries to reduce their trade barriers to US goods, or we might end up with a series of retaliatory steps back and forth that seriously reduce world trade. If world trade goes down. companies that faced stiff foreign competition will prosper, but companies that relied on low-cost imports will see rising costs. There are winners and losers all around, and no one is sure right now who those winners and losers will be. So the market is sliding.
My opinion is, ride it out, in a few months (probably) we'll see where things are going, and the market will go up again. If you think you can predict where all the chips will land when they fall, then now is a great time to buy stock in the companies you think will be winners. Odds are you have no idea how this will end up.
Knowing when to sell is always tricky. If you buy when a stock goes up and panic sell when it goes down, then you'll lose money every time. On the other hand, if you ride a loser into the ground, you'll lose your whole investment. If I had a full-proof method for deciding when to sell, I'd be a billionaire stock analyst now instead of some schmuck posting on a forum.