In addition to researching individual companies, it is also important to have an understanding of the industry in which they operate. A good place to start is a comprehensive industry report that provides a broad overview. This can then be supplemented by searching industry news.
Industry reports are a comprehensive account of a particular industry, including the current size and value of the industry, the competitive landscape, the outlook for the industry, key products and services, barriers to entry, threats to the industry, and key trends affecting the industry.
Always check the date to make sure the information is current! And be sure to supplement these reports with information found in newspapers and trade publications.