Freddie Mac earned just $227 million in the fourth quarter, blaming the 90 percent sequential decline in profits on derivative losses of $3.4 billion. In a briefing with the media, Freddie CEO Don Layton went out of his way to explain that when interest rates eventually rise, the government-sponsored enterprise could benefit greatly. “I wish that accounting was more tied to economics but it’s not,” he said. Layton stressed...