Before Making the Decision to Purchase a Stock
by Roger Wohlner
The decision to purchase a stock can't be made solely from a review of financial ratios. You should also evaluate subjective factors, such as the quality of management, prospects for the company's industry, and where the company stands in relation to competitors.
Source: http://www.investorguide.com/igu-article-828-stock-strategies-evaluating-potential-stock-investments.html