The Fed bought around $300 billion of the bonds in each of March and April, and since then has been buying about $100 billion a month.
It now owns almost a third of bonds backed by home loans in the U.S. Buying the securities has pushed mortgage rates lower, with the average 30-year rate falling to 2.91% as of last week from 3.3% in early February.
- Source, Wall St for Main St