Freddie Mac said on Friday that its mortgage portfolio shrank in August as did its total debt outstanding, while delinquency rates on loans it guarantees were mixed.

The retained mortgage investment portfolio declined by about $10.3 billion, or by an annual 17 percent rate, to $715.7 billion. This downsizing has occurred in all but two months of this year.

The company's mortgage asset holdings were $755.3 billion at the year-end and $779.4 billion in August 2009.

Freddie Mac said its total mortgage portfolio declined at an annual 5.2 percent rate last month. The company's total debt outstanding shrank to $762.2 billion from $773.3 billion in July and a peak this year of $831.4 billion in March.

The single-family delinquency rate fell to 3.83 percent from 3.89 percent in July but was still up from 3.24 percent a year ago. The multi-family delinquency rate rose to 0.32 percent from 0.32 percent in July and was well above 0.12 percent in August 2009.

(Reporting by Lynn Adler, Editing by Chizu Nomiyama)

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