The individual and incremental information content of different economic determinants of common stock systematic risk is determined in the Finnish stock market. Based on previous theoretical articles, four financial characteristics of a firm are investigated: profitability, financial leverage, operating leverage, and corporate growth, measured as growth in earnings and dividends. In three of the four subperiods, the most important factor explaining stock returns is found to be highly related to the leverage of the firm. The results imply that the marginal utility of evaluating a large number of different financial ratios may be quite low. Instead, decisionmakers might be better off by concentrating in a relatively low number of key financial ratios of companies.
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