Preparations for a hoped-for return of non-agency jumbo origination and securitization have taken a financial toll on Redwood Trust, according to officials at the real-estate investment trust. “We have built our origination businesses for more volume than is currently available on the right terms,” Redwood officials said last week as part of their earnings release for the second quarter of 2011. “We believe our scale will ultimately pay off. For now, however, our operating costs are high relative to the net revenues we can earn off our invested capital without taking ...