That was up from the previous week's net purchases of $18.8 billion.
The purchases brought the U.S. central bank's purchase of mortgage bonds guaranteed by Fannie Mae, Freddie Mac and the Federal Home Loan Bank system to roughly $861.9 billion since January.
The Fed said it bought $31.22 billion gross of agency MBS from September 10 through September 16. At the same time, it sold $5.77 billion in mortgage securities.
The Fed aims to buy up to $1.25 trillion of agency MBS in a bid to bring down mortgage rates and to stimulate the battered housing sector and the overall economy.

![Helen Mirren: Dying Boy, Oliver Burton, Gets His Last Wish Thanks To Actress Dressed As Queen Elizabeth [PHOTOS] Helen Mirren: Dying Boy, Oliver Burton, Gets His Last Wish Thanks To Actress Dressed As Queen Elizabeth [PHOTOS]](http://s1.ibtimes.com/sites/www.ibtimes.com/files/styles/v2_multimedia/public/2013/05/22/helen-mirren-visits-dying-boy_1.jpg)


![Oklahoma Tornado 2013: Photos And Footage Of The Twister's Devastation [PICTURES, VIDEO] Oklahoma Tornado 2013: Photos And Footage Of The Twister's Devastation [PICTURES, VIDEO]](http://s1.ibtimes.com/sites/www.ibtimes.com/files/styles/v2_multimedia/public/2013/05/20/oklahoma-tornado_1.png)

![Billboard Music Awards 2013: All The Fashion On The Billboards Red (Er, Blue) Carpet [PHOTOS] Billboard Music Awards 2013: All The Fashion On The Billboards Red (Er, Blue) Carpet [PHOTOS]](http://s1.ibtimes.com/sites/www.ibtimes.com/files/styles/v2_medium/public/2013/05/20/keha-givenchy.jpg)




















Like or Follow us for updates on the biggest stories!