Financial ratios are part of the broader topic financial statement analysis. Since most of the financial ratios are calculated from amounts reported on recent financial statements, they are historic in nature.
The following financial ratios are calculated by using amounts reported on the balance sheet: working capital, current ratio, quick ratio, debt to equity ratio, and debt ratio. The first three ratios are indicators of a corporation's liquidity. The latter two ratios are indicators of a corporation's degree of leverage.
The following financial ratios use amounts from both the balance sheet and the income statement: inventory turnover, accounts receivable turnover, return on equity, and return on assets. For example, the inventory turnover ratio is calculated by dividing the cost of goods sold (from the income statement) by the average inventory amounts that are found on the balance sheets.
Other financial ratios use amounts only from the income statement. For example the gross margin ratio is the gross profit divided by net sales. The return on sales is the net income divided by net sales. These financial ratios are indicators of a company's profitabity.
In addition to financial ratios, another tool in financial statement analysis is common-size financial statements. A common-size balance sheet results when every amount on the balance sheet is divided by the amount of total assets. A common-size income statement is the result of dividing each item on the income statement by the amount of net sales. Common-size financial statements allow for a comparison between companies of any size and also with industry averages. For example, a corporation's common-size balance sheet might indicate that its current assets are 40% of its total assets. That percentage can then be compared to a competitor's percentage and to the percentage for its industry.
If a corporation's stock is publicly traded, the Management Discussion section of its annual report to stockholders provides helpful information behind the financial ratios.
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