Fannie Mae's October portfolio jumps 28 percent

NEW YORK, Nov 25 (Reuters) - Fannie Mae (FNM.P), the largest U.S. home funding source, said it beefed up its mortgage investment portfolio in October, the first full month that the company was under government control.

The company's mortgage holdings grew at a nearly 28 percent annual rate last month to $777.1 billion from $761.4 billion in September.

Commitments to purchase mortgages and securities in future months were $33.48 billion in October compared with $43.76 billion the prior month.

Seriously delinquent rates on Fannie Mae conventional single-family mortgages jumped 15 basis points in September, the latest month reported, to 1.72 percent, the company said in a statement.

Freddie Mac (FRE.P), the second largest U.S. home funding source, on Monday reported a 43.6 percent jump in its retained mortgage portfolio to $763.7 billion in October. The company, also taken under government control in early September, said its agreements to buy mortgages in coming months rose to $17.4 billion in October from $2.5 billion the prior month. (Reporting by Lynn Adler, Editing by Chizu Nomiyama)