The latest jumbo mortgage-backed security from Two Harbors Investment is set to have the lowest credit enhancement levels of any deal issued this year, according to an analysis by Inside Nonconforming Markets. Strong performance and underwriting characteristics along with repeat issuance appears to have helped decrease credit enhancement requirements for the transaction. The $241.06 million Agate Bay Mortgage Trust 2015-3 received a preliminary AAA rating ... [Includes one data chart]