"The Fed’s purchases today will be its second this week, after it bought $2.551 billion of notes on Aug. 17. The central bank plans to purchase about $18 billion of U.S. debt by the middle of September using the money from principal payments on its holdings of agency debt and agency mortgage-backed securities, according to its website." Read more. "Treasure 10-Year Yields Near 17 Month Low as Fed, Japanese Investors Buy" Wes Goodman Bloomberg, August 19, 2010. Image by dream designs / FreeDigitalPhotos.net.