I am not talking about big-time investors, like the ones you see on TV, in conference rooms during board meeting and arguing with everybody else. I am talking about ordinary folks. I have read different sources about the fact that common people, like an ordinary nurse, can invest in the stock market (or trade if they have all the time). Different countries have different brokers (online or whatnot, with online being the easiest today) and different requirements on how to open an account. But the question I have in mind is, can a citizen of one country invest in companies in another country? For example, can an IT personnel from Singapore buy stocks from the Korean stock market? How does that work, if it is possible?