There are three types of financial statement comparisons: intra-company, inter-company, and industry averages. Three tools are used for analysis: horizontal analysis examines trends over time, vertical analysis expresses items as a percent of a base amount, and ratio analysis includes liquidity, solvency, turnover, profitability, and market value ratios. Ratios are calculated to measure different aspects of a company's financial health and are used by creditors, stockholders, and others to evaluate performance.