New issuance of single-family agency MBS pass-through securities increased by 12.2 percent from July to August, pushing the market over the $1 trillion mark for the year with plenty of gas still in the tank. A new Inside MBS & ABS ranking and analysis reveals that all three agencies saw solid gains in MBS issuance last month, largely based on increased refinance activity. Agency MBS production climbed to $149.2 billion in August, the highest monthly production level since March. Ginnie Mae posted the biggest gain, a 15.1 percent increase from July levels, but Freddie Mac (13.5 percent) and Fannie Mae (10.3 percent) also saw healthy increases in production volume. Total agency issuance for the first eight months of 2012 was...[Includes one data chart]