"In the world of banking, a solid understanding of financial metrics is crucial not just for managers and regulators, but also for investors, analysts, and those concerned with financial system stability. Concepts like the Capital Adequacy Ratio (CAR), Non-Performing Loan Ratio (NPL ratio), and debt classification criteria based on overdue days are the 'health indicators' of a bank's performance and stability. These metrics provide valuable insights into a bank's financial health, risk management, and overall operational efficiency. So, let's delve into these concepts and decipher the language of banking metrics to enhance our understanding of this intricate industry."