Mumbai: The Reserve Bank of India (RBI) on Thursday raised its key policy rate by a quarter percentage point to 7.5%, in line with market expectations, and continuing its fight against inflation in the world?s second fastest growing major economy. This will make money costlier and impact growth, something RBI is conscious of. The central bank???s mid-quarter monetary policy review said the policy stance remains ???firmly anti-inflationary??? even at the cost of slowing growth in the ???short run???.