That said, learning the logistics of how to buy stocks and earmarking a small sliver of your investable assets to buying individual stocks online can be fun and profitable. And at worst? As long as you don’t put money you can’t afford to lose on the line, stock trading will be a temporary diversion that leads to limited losses, lessons learned and a few self-deprecating stories to entertain dinner guests.
Investing in stocks can be very costly if you trade constantly, especially with a minimum amount of money available to invest. Every time that you trade stock, either buying or selling, you will incur a trading fee. Trading fees range from the low end of $10 per trade, but can be as high as $30 for some discount brokers. Remember, a trade is an order to purchase shares in one company - if you want to purchase five different stocks at the same time, this is seen as five separate trades and you will be charged for each one.
According to one interpretation of the efficient-market hypothesis (EMH), only changes in fundamental factors, such as the outlook for margins, profits or dividends, ought to affect share prices beyond the short term, where random 'noise' in the system may prevail. The 'hard' efficient-market hypothesis does not explain the cause of events such as the crash in 1987, when the Dow Jones Industrial Average plummeted 22.6 percent—the largest-ever one-day fall in the United States.
Stocks are categorized in various ways. One way is by the country where the company is domiciled. For example, Nestlé and Novartis are domiciled in Switzerland, so they may be considered as part of the Swiss stock market, although their stock may also be traded on exchanges in other countries, for example, as American depository receipts (ADRs) on U.S. stock markets.