 By March 2009, it held $1.75 trillion of bank debt, mortgage-backed securities, and Treasury notes; this amount reached a peak of $2.1 trillion in June 2010.Further purchases were halted as the economy started to improve, but resumed in August 2010 when the Fed decided the economy was not growing robustly.After the halt in June, holdings started falling naturally as debt matured and were projected to fall to $1.7 trillion by 2012.