6 pc CIB of 5-year tenure was initially introduced and now it has been proposed, in consultation with the government, to reintroduce a modified CIB with structured features of similar instructions prevalent internationally, RBI said in a discussion paper on CIB released here. Subsequent to that issuance, there was no further issuance of CIB mainly due to lack of enthusiastic response of market participants for the instrument, both in primary and secondary markets, it said.