Investment management is the professional management of various securities (shares, bonds and other securities) and assets (e.g., real estate) in order to meet specified investment goals for the benefit of the investors. Investors may be institutions (insurance companies, pension funds, corporations, charities, educational establishments etc.) or private investors (both directly via investment contracts and more commonly via collective investment schemes e.g. mutual funds or exchange-traded funds).

The term asset management is often used to refer to the investment management of collective investments, (not necessarily) while the more generic fund management may refer to all forms of institutional investment as well as investment management for private investors. Investment managers who specialize in advisory or discretionary management on behalf of (normally wealthy) private investors may often refer to their services as wealth management or portfolio management often within the context of so-called "private banking".

The provision of 'investment management services' includes elements of financial statement analysis, asset selection, stock selection, plan implementation and ongoing monitoring of investments. Investment management is a large and important global industry in its own right responsible for caretaking of trillions of yuan, dollars, euro, pounds and yen. Coming under the remit of financial servicesmany of the world's largest companies are at least in part investment managers and employ millions of staff and create billions in revenue.

Fund manager (or investment adviser in the United States) refers to both a firm that provides investment management services and an individual who directs fund management decisions.

Source:http://en.wikipedia.org