An accounting method that values assets and liabilities at their current market prices rather than their historical cost. This approach provides real-time valuation but can introduce volatility into financial statements as market prices fluctuate.
The phrase emerged in the 1970s with the growth of derivatives trading and became prominent during the savings and loan crisis of the 1980s. It gained widespread attention after the Enron scandal, where mark-to-market accounting was controversially applied to long-term contracts with uncertain future cash flows.
Mark-to-market is like constantly updating your home's value based on what similar houses sold for yesterday - it's brutally honest but can make your net worth swing wildly based on market moods! This method can turn paper profits into real accounting gains, which is why it's both loved and feared on Wall Street.
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