Mumbai-In a statement Reserve bank of India said that to ensure greater transparency, central bank has proposed that floating interest rates on personal, home, auto and MSMEs loans be linked to external benchmarks like repo rate or treasury yields. Guidelines to link the interest rate to external benchmarks will be issued by the end of this month said RBI.This is likely to become operational by 1st April 2019.Banks should decide the benchmark rate system to be followed right at the inception of the loan and it should remain unchanged through the life of the loan said RBI.