An investor that uses his/her money to achieve positive social/environmental benefits, as well as a The money that an investor achieves from an investment. It is usually expressed as a % of the total amount invested over a period of time. It can also be called 'Rate of Return'. The monetary surplus generated by an organisation on an investment. It may be expressed as "not" (i.e. after deducting all expenses from the gross income generated by the investment) or "gross".. A social investor will often accept a lower financial return for greater social/environmental benefits from the investment.