Meanwhile, DBRS boosted its share of the rated market to 62.6%, Inside MBS & ABS found…

Two of the top nonbanks had remarkable starts to the year. Second-ranked Quicken Loans posted a 13.6% increase in production from the fourth quarter and third-ranked United Wholesale Mortgage upped its volume by a stunning 63.1%.

Then again, nearly all of the increase in broker activity came from United Wholesale Mortgage, the dominant funder of broker loans.

The expanded credit sector (which includes non-QM lending) shows promise but accounted for just 2.8% of total residential MBS issued in the first quarter, according to Inside MBS & ABS.