Banks still have to mark the loan to its market value on their books and set aside funds for losses that are reported in quarterly results. The deliberations of how some of these banks are thinking about accounting for these losses have not been previously reported. Three banking industry sources said the remaining $3 billion, which is unsecured, could lead to steeper losses for the seven Twitter banks. Some market participants expect the losses from the debt to be significant unless market conditions improve. Some $35 billion to $40 billion of such loans are stuck on banks' books, according to two fixed income bankers.

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