The Federal Reserve purchased $22.705 billion worth of agency mortgage-backed securities during the week from June 25 to July 1, compared to $22.859 billion the week before.

Since 2011, the Fed has been using funds from principal payments on the agency debt and agency MBS it holds to reinvest in agency MBS, according to a Reuters report. The program was initiated to help stimulate the housing market.

While the Fed bought more than $22 billion in agency MBS in the latest week, it sold no securities guaranteed by Fannie Mae, Freddie Mac or Ginnie Mae that week, or the week prior, Reuters reported.