Which of the following is NOT one of the metrics to gauge a company's financial health?

Market share is not typically considered a direct measure of a company's financial health. Instead, it represents a company's portion of total industry sales and is more related to competitive positioning and market dynamics. Financial health is assessed through various quantitative metrics that relate to a company's profitability, liquidity, solvency, and operational efficiency.

The correct answer highlights that while market share indicates a company's performance in relation to its competitors, it does not provide insights into its financial stability or overall fiscal strength. In contrast, metrics like return on equity, debt to equity ratio, and current ratio are integral in analyzing how effectively a company is generating profit, managing its debt load, and maintaining adequate liquidity to support its ongoing operations. These financial metrics paint a clearer picture of a company's economic health and its ability to generate value for shareholders.