Fannie Mae issued nearly $70 billion in mortgage-backed securities in October — the most since the 2009 refinancing boom fueled by Federal Reserve purchases of agency MBS.

In October, Fannie issued $69.7 billion in MBS, compared with $79.7 billion in July 2009 during the previous boom.

The government-sponsored enterprise's monthly activity report also shows higher commitments to purchase mortgages.

The secondary market agency said net purchase commitments rose by $9 billion during October, to $70.2 billion.

Meanwhile, the percentage of single-family loans 90 days or more past due fell 14 basis points since August, to 4.56% in September. (Fannie has a one-month lag in reporting delinquencies.)

Fannie's serious delinquency rate peaked in February at 5.59% and it is now below the 4.72% rate in September of 2009.

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