primary instrument

Definitions

Electronics

  • An instrument which can be calibrated without utilizing another device or instrument.

Forex

  • A financial asset which is priced according to its market value. Stocks, bonds and any other financial assets which have their own intrinsic worth are considered a primary instrument. Derivative instruments, such as options and futures contracts, are valued depending on the value of the underlying asset.
http://www.dictionarycentral.com/definition/primary-instrument.html