The first thing that you need to know when investing in stocks is that you should have the right amount of money. The minimum amount that is needed to start investing ranges from $500 to $5,000. When buying stocks, you should be careful to buy stocks from companies that are making profits. Stocks should also not account for 100 percent of your assets. Visit http://beginnersinvest.about.com/od/stocksoptionswarrants/a/what-is-stock.htm for more information.