Real versus nominal value (economics)
Gross domestic product (GDP) is a measure of aggregate output. Nominal GDP in a particular period reflects prices which were current at the time, whereas real GDP compensates for inflation. Price indices and the U.S. National Income and Product Accounts are constructed from bundles of commodities and their respective prices. In the case of GDP, a suitable price index is the GDP price index. In the U.S. National Income and Product Accounts, nominal GDP is called "GDP in current dollars" (that is, in prices current for each designated year), and real GDP is called "GDP in [base-year] dollars" (that is, in dollars that can purchase the same quantity of commodities as in the base year).
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.