You can define stocks in many ways.
Size is perhaps the most common.
Stocks are also categorized by the types of companies that issue them. Yet another way to tell one stock from another is by the investment style of the mutual-fund managers likely to choose them. Understand the Difference Growth stocks generally are companies with above-average growth potential. Value stocks are, at first glance, not the most attractive investment opportunities you will find. Many are coming off periods in which they have experienced a decline in earnings, lost an important client, or suffered a major loss within the executive ranks.