Deephaven Mortgage is preparing to issue its largest nonprime mortgage-backed security to date, according to presale reports published this week. The planned $326.1 million Deephaven Residential Mortgage Trust 2018-3 will top a $308.2 million deal the firm issued in January. Mortgages in the new deal look similar to previous issuance from Deephaven. The loans have a weighted-average credit score of 700, an average combined loan-to-value ratio of 72.7 percent and an average ...