Two of the most prolific issuers of jumbo mortgage-backed securities this year have offered investors some variety with their latest deals. JPMorgan Chase stocked its deal with older loans while Two Harbors Investment has focused on fresh originations. Last week, Chase issued JPMorgan Mortgage Trust 2015-5. The $489.64 million deal was backed by loans with a weighted average loan age of 28.9 months, according to Kroll Bond Rating Agency. The MBS ...