The face value of a security, often referred to as par or face value, is its redemption price and is usually shown on the face of that security.
For bonds, the face value is the face value and will differ from its market value depending on market interest rates.
The nominal (nominal) value of preferred shares is important because it is used to calculate dividends, while the nominal value of ordinary shares is an arbitrary value determined for balance purposes.
In economics, the nominal value refers to the current monetary value and does not take into account the effect of inflation.