"If disinflation happens in much faster rate than anticipated and we believe we can finish this period with the appropriate amount of final disinflation, we certainly will be in position to cut the interest rate at that time," Rajan told researchers and analyst at the post-policy conference call.
Explaining, he said a "good" budget focusing on the already-on fiscal consolidation by reducing subsidies and improving investments would be helpful on inflationary front.
The Governor noted "we are in early days in the disinflationary process, we have to see how it works out, but we are hopeful that it would play out well."
Rajan said he would like monetary policy to be stable and not react to every incoming data.
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RBI-appointed Urijit Patel panel, in its report, has set CPI target of 8 per cent by 2015 and 6 per cent by 2016.
The apex bank has tried to forecast consumer price index and is setting interest rates with idea that it would achieve a certain level of CPI at a particular time, he said.
"Which means that we are willing to look through the transient increases in CPI or transient decline in CPI, once such transient decline could be because of base effect. We are willing to look through these with the view of achieving a medium-term goal that we have set," Rajan said.