Redwood Trust saw steady progress in growing its residential mortgage business in the first quarter of 2012, which was highlighted by two securitizations totaling $745.0 million, according to the company’s recent filing with the Securities and Exchange Commission. The Mill Valley, CA-based real estate investment trust reported first quarter income of $30 million, compared to a loss of $3 million in the previous quarter and $18 million in profits a year ago. The increase resulted from a combination of Redwood’s new mortgage banking activities that include gains from the $416 million jumbo MBS...