Credit Suisse late last week broke a two-month lull in jumbo MBS issuance, and JPMorgan Chase appears to be planning a new security. However, the jumbo MBS market is far from flourishing as other issuers continue to avoid the sector. Credit Suisse issued a $287.42 million jumbo MBS last week. CSMC Trust 2014-IVR1 received a AAA rating from DBRS with credit enhancement of 6.85 percent on the top-rated tranche. The deal had...