RBI/2008-09/ 34 DBOD No. BP. BC. 5 / 21.04.141 / 2008-09 July 1, 2008 All Commercial Banks (excluding Regional Rural Banks) Dear Sir, Master Circular – Prudential norms for classification, valuation and operation of investment portfolio by banks Please refer to the Master Circular No. DBOD. BP. BC.15 / 21.04.141/ 2007-08 dated July 2, 2007, containing consolidated instructions/guidelines issued to banks till June 30, 2007, on matters relating to prudential norms for c