The jumbo features that Moody's worries about include super senior support bonds, exchangeable securities, principal-only bonds, and pool interest-only bonds.
The talk has prompted speculation that the FHFA could lower the conforming loan limit to $400,000 or, as conservator of the GSEs, direct them to reduce high-cost loan limits.
Banking regulators believe delinquency rates on HELOCs soon may rise sharply upward as a significant number of second liens reach the end of their draw period.
Nationstar's new filing with the Securities and Exchange Commission offers little in the way of information on the terms of the new $1 billion facility.