Fannie Mae pushed volume up for the fifth consecutive month.
The secondary lender's business volume of $52.5 billion in July was above the previous month's $48.8 billion but did not manage to surpass the $55.6 billion a year ago, according to Fannie's latest monthly summary report.
The $9.4 billion in portfolio purchases and $43.1 billion in mortgage-backed securities acquired by others reportedly accounted for the Washington, D.C.-based company's July volume.
In contrast to Fannie's increased purchases, rival secondary mortgage buyer Freddie Mac has seen its business purchases slip recently.
Fannie said its $2.3 trillion book of business consisted of $1.5 trillion in outstanding mortgage-backed securities and a $0.8 trillion gross mortgage portfolio.
Single-family delinquency, which the government sponsored housing enterprise reports on a one-month lag, was unchanged for the third consecutive month in June at 0.57%.
Fannie's effective duration gap, which measures the balance of Fannie's cash flows on assets and liabilities, was a positive 1 month in July, changing from 0 months in June, according to the report.