This article discusses the measurement methodologies and non-GAAP techniques used by Walmart in financial reporting to provide decision-useful information to stakeholders and investors. It also explores the use of mark-to-market accounting, special purpose entities, and stock options by Enron and their impact on financial reporting. The article provides insights into the importance of adhering to Generally Accepted Accounting Principles (GAAP) and International Accounting Standards (IAS) to avoid misleading investors.