The Piotroski Score is a financial analysis tool developed by Joseph Piotroski, a professor of accounting at Stanford University. It is a nine-point scale that is used to evaluate the financial health and stability of a company.The Piotroski Score is based on a set of financial criteria that are designed to assess a company's profitability, financial stability, and efficiency. These criteria include measures such as return on assets, cash flow, and debt ratios.To calculate the Piotroski Score, each of the nine criteria is assigned a value of one point if it meets certain conditions, and a value of zero if it does not. The total score is then calculated by summing the nine individual scores. A score of nine is the highest possible score, indicating that the company is in excellent financial health, while a score of zero is the lowest possible score, indicating that the company is in poor financial health.The Piotroski Score is often used by investors as a way to assess the financial strength of a company and to identify potential investment opportunities. It is also used by analysts and researchers as a way to evaluate the performance of a company over time.