Monetary policy controls the supply of money in an economy through interest rates and other tools to achieve objectives like price stability and low unemployment. It can be expansionary by lowering rates to boost the economy during recessions, or contractionary by raising rates to curb inflation. In India, the Reserve Bank of India executes monetary policy using tools like the bank rate, cash reserve ratio, statutory liquidity ratio, repo rate, and reverse repo rate to influence the money supply and interest rates. As of October 2012, key rates like the repo rate were at 8% while inflation was at 7.5%.