- Pension Fund: a fund (such as the Social Security Investment Fund) that manages the assets of the Social Security Corporation (SSC) to realize meaningful and sustainable returns on these assets  to meet the liquidity needs of SSC’s future obligations, while maintaining the assets real value.
The maturity of pension funds’ investments vary to include short, medium or long -term investments, based on the pension scheme and age group of pensioners and retirees.
Investments of these funds are usually allocated into different instruments; fixed income instruments (such as bonds and deposits), in addition to real estate and equity. 
The mandate of those pension funds’ investment depends on the targeted returns, risk appetite and the required maturities. 

- Sovereign Fund: a state-owned investment fund that manages the money and assets that are owned by the government.
  These funds usually target high risk / high return investments with various maturities.

- Assets: resources owned by SSC and managed by SSIF. These assets come from two components; from SSIF’s income and SSC's contribution surpluses.

- SSIF Income: It is generated from return on investment of money market instruments, ‎bonds, loans, public and private equity, tourism, real estate in addition to dividends. ‎

- SSIF Comprehensive Income: It  is composed of the SSIF  income from its investment activities ‎in addition to the reevaluation of the equity portfolio through comprehensive income.‎

- Investment Portfolios: Investment tools / instruments that are managed by SSIF in accordance with the best international practices.

- Strategic Asset Allocation: The distribution of assets to different investment classes / sectors in accordance with the best international practices of pension funds to achieve the highest risk adjusted returns on various investments.‎

- Surplus: The money that SSC transfers to SSIF to managed within SSIF mandate that is approved by SSC Board. 

- Gross domestic product (GDP): It is the total market value of the goods and services produced by a country's economy during a specified period of time.