The Central Statistics Office (CSO), under the Ministry of Statistics and Programme Implementation, publishes the annual 'National Accounts Statistics'. It contains key macroeconomic data including GDP, Fixed Capital Formation, savings, and other national income aggregates for India.

Arbitrage is the practice of simultaneously buying an asset in one market at a lower price and selling it in another market at a higher price to profit from the price difference. It plays a key role in making markets efficient by equalizing prices across markets.

Gross Domestic Product (GDP) is the total monetary value of all finished goods and services produced within a country's borders in a given time period. It is the most widely used measure of an economy's size and health. GNP includes income from abroad, while NNP deducts depreciation from GNP.