Assuming there were Billions in securitized assets held by FDIC remote WMB SPE's, NONE of those assets could be seized by the FDIC to be sold or reclaimed by the Receivership.
The Interests these SPE's held as company assets fall under these protections and IMO were the Available for sale securities WAMU held to the tune of $25B as of June, 2008, a mere 3 months before the seizure of WMB.
Very little detailed info is known about this $25B asset WAMU owned in terms of which SUB/SPE held them and what happened to them after the seizure of WMB.
Escrow Returns: $2-$10 Billion....75%/25% to the End