New issuance of agency MBS fell by 10.2 percent in August as the securitization surge from heavy mortgage refinance activity earlier this year continued to lose momentum. A total of $150.45 billion of new agency MBS were issued last month, the lowest level since April. That raised year-to-date volume to $1.247 trillion, up 43.8 percent from the first... [Includes one chart and one graph]