According to Investopedia.com, Mark-to-Market accounting “measures the fair value of accounts that can change over time, such as assets and liabilities. It records the price or value of a security, portfolio, or account to reflect its current market value, rather than its book value.” Mark to Market accounting was originally put into practice to prevent company’s liabilities from being hidden. FASB was worried that businesses were maintaining their bad assets on their books, rather than writing them down to their true value.