Seven months ago, a fledgling nonprime lender called Deephaven Mortgage unveiled a $300 million investment in the firm by a global “alternative” hedge fund called Varde Partners, Minneapolis. But since then, not much has been heard about Deephaven. Then again, it might be said that the “new” nonprime industry is still trying to figure out how to operate in a world of tight regulation, non-QM lending and a securitization market that doesn’t want to touch its product. Matt Nichols, the former Goldman Sachs managing director who formed Deephaven two years ago, did not respond...