There is a line item in pre-bk WMi’s 10-ks, specifically illustrating income from its securitization participation. From 2004-2007 WMI averaged about $6B annually from cert participation.
1) $6B x (last 10 years accumulating) = $60B + annually compounding interest......has accumulated.
+
2) accumulation of liquidation proceeds of the loan principle that created $6B annually in cert participation