Foreign exchange reserves are foreign currency assets held by central banks. They include foreign securities, gold, special drawing rights from the IMF, and reserve positions. Central banks hold reserves to maintain stable currencies, reduce economic shocks, and facilitate international payments and hedge exchange rate risks. India's foreign exchange reserves have grown substantially over time, from $1.8 billion in 1951-52 to $2.94 trillion in 2015-16, allowing the country to grow faster than other economies.