Issuance in the jumbo mortgage-backed securities market has nearly stopped in the first quarter of 2016, but not all issuers are ready to abandon the sector. “The securitization market has been slow to re-open but there’s a lot of optionality to that business to the extent that the banks’ lust for mortgages on their balance sheets changes in different interest rate environments,” said William Roth, CIO of Two Harbors Investment. “The ability for us to grow that business dramatically is there ...