The flow of new mortgage business at Fannie Mae and Freddie Mac has clearly slowed down in the first two months of 2006, a trend that likely reflects a broader cooling of the market. According to mortgage securities data analyzed by Inside Mortgage Finance, new single-family mortgage pool production at the two government-sponsored enterprises fell from $79.34 billion in December to $75.19 billion in January and just $62.86 billion last month. That’s the lowest monthly… [One data table included]