Investment Bank

Definition: an Investment Bank is a financial institution that assists corporations, governments and individuals in raising capital by underwriting and/or acting as the client's agent in the issuance of securities.
An IB may also assist companies involved in mergers and acquisitions, and provide ancillary services such as market making, derivatives trading, fixed income trading, foreign exchange trading, commodity trading, and equity trading.

More on investment banks.
More on banking: Commodity Trading, Equity Trading, Fixed Income Trading, Foreign Exchange Trading.

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