The Prime Bank Loan Rate, as reported today by the St. Louis Federal Reserve, stood at 3.25% as of September 1st, 2011. This rate has been steady at 3.25 % since January 2009.
Currently it is at its lowest levels in the past five decades. The rate may have been intentionally kept low to support an expansionary monetary policy due to the severe recession in 2008.
From the St. Louis Federal Reserve, reported by Disha Bheda.