Besides Citi, a handful of large depositories are in the midst of wrapping up sizable MSR auctions this week, including offerings from Wells Fargo and Flagstar Bancorp.
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.