List of countries by GDP (nominal)
Gross domestic product (GDP) is the market value of all final goods and services from a nation in a given year. Countries are sorted by nominal GDP estimates from financial and statistical institutions, which are calculated at market or government official exchange rates. Nominal GDP does not take into account differences in the cost of living in different countries, and the results can vary greatly from one year to another based on fluctuations in the exchange rates of the country's currency. Such fluctuations may change a country's ranking from one year to the next, even though they often make little or no difference in the standard of living of its population.
GDP-linked bond
GDP-linked bonds are a form of floating-rate bond with a coupon that is associated with the growth rate of a country, just as other floating-rate bonds are linked to interest rates, such as LIBOR or federal funds rate, or inflation rates, which is the case of inflation-indexed bonds. These securities can be issued to reference real GDP, nominal GDP or aspects of both. In some cases, however, these securities may not have any principal claim and the notional is only used as a basis for calculating the investor's share of payments.