Back in April, I wrote about the odd way in which investor concerns about potential defaults at Citigroup and Bank of America were boosting the banks’ earnings. I quoted commenter sulliclm‘s explanation:
they have to mark their liabilities to fair value, and in the case of their own debt (or in this case liabilities on derivative positions), they have to consider their own default potential as a component of fair value. So the more likely it becomes that Citi will default on their debt/swaps, the less those instruments are worth to the investors that hold them. Therefore the accounting guidance says that Citi should reduce the value of the liabilities on their books, and they book this reduction as a gain through the income statement. As an auditor I find the guidance to be ridiculous, but its the rule so companies are following it …