A central bank such as the Reserve Bank of India (RBI),
periodically intervenes in the debt market to influence
the interest rates and rate of inflation in the economy.
If
RBI feels inflation is too high, it will sell government
securities, and suck money out of the system. This act
will push up interest rates in the economy, and businesses will cut back on capital expenditure financed by loans,
reducing the demand for money.
Central banks also intervene periodically in foreign
exchange markets.
If the rupee is rapidly depreciating,
RBI will sell dollars in the market. This will increase the
supply of dollars and the demand for rupees, causing
the rupee price of the dollar to come down.
On the
contrary, if the rupee is rapidly appreciating, RBI will
buy dollars and inject rupees into the economy. This will increase the demand for dollars and the supply of
rupees, thereby leading to an increase in the rupee
price of the dollar.
If interest rates in
the US or the EU were to fall, FIIs (Foreign Institutional
Investors) will ramp up investments in India. The
resultant demand for rupees will cause the rupee to
appreciate. In response, RBI will buy dollars and inject
rupees into the system.
Source: VisionIAS