Which type of ratio should be used to evaluate the current share price of a public firm?

Liquidity ratios, such as the current ratio and quick ratio, measure a firm's ability to meet its short-term obligations. While important for assessing financial health and operational efficiency, these ratios do not directly relate to share price evaluation or market sentiment regarding the stock's value.

Profitability ratios, including return on equity (ROE) and profit margin, evaluate a company's ability to generate profit relative to sales, assets, or equity. Although profitability impacts overall business performance and can influence share price, these ratios do not specifically assess the current market valuation of a firm's shares.

Activity ratios, such as inventory turnover and receivables turnover, measure how efficiently a company utilizes its assets to generate revenue. While they can indicate operational performance, they do not provide a framework for assessing the current share price of a firm, which is primarily influenced by market perceptions and financial metrics.