This document provides background information on the Enron accounting scandal. It discusses Enron's history and expansion into new businesses in the 1990s and 2000s. It describes how Enron used mark-to-market accounting and special purpose entities to hide debts and inflate profits. When Enron's financial issues came to light in late 2001, it filed for bankruptcy in December 2001. Its auditor, Arthur Andersen, was also implicated for destroying Enron documents.