QE1,2,3

QE1: Nov. 2008 -June 2010
500 Billion, This program was expanded by $750 Billion in March 2009 under President Obama.

QE2: Nov. 2010 -June 2011
70 Billion a Month and bought treasury bills to spur up the economy

QE3: SEP. 2012 - xxxx
40 Billion a Month, tentatively last for a year. Will print more to stimulated the economy

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http://cn.wsj.com/gb/20120914/bus085648.asp
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http://cn.wsj.com/gb/20120914/BUSc-014121.asp