A spike in issuance of jumbo mortgage-backed securities in the last days of the second quarter of 2014 wasn’t enough to boost issuance to the meager levels seen in the previous quarter, according to a new ranking and analysis by Inside Nonconforming Markets. Some $1.25 billion in jumbo MBS were issued in the second quarter, a 24.9 percent decline from the previous quarter. Four issuers brought deals to the market during the quarter ... [Includes one data chart]