Implied Alpha - The excess return expected from a stock to justify its current weighing in the portfolio.

Impulse - A sharply defined change in a series of input data being studied, such as market prices or volume.

Impulse Wave - A sharply defined change in a series of input data being studied, such as market prices or volume.

In Bond - As applied to air freight coming into a country the term ‘in bond’.

In Play - A stock that is the focus of a public bidding contest, as in a takeover or bear raid.

Income Dividends - Payments to mutual fund shareholders consisting of dividends, interest and short-term capital gains.

Indemnity - A form of contract when a party (who thereby becomes primarily liable) undertakes to compensate another for loss they may suffer as a result of a transaction with a third party.

Inductive Logic - The progress from statements describing particular events to a general statement.

Inefficient Markets - Driven by frame dependence and heuristic bias, when market prices stray from fundamental values.

Initial Balance - The first or first two half-hour trading periods in the CBOT Market Profile during which prices tend to converge; the initial auction of the trading day.

Initial Public Offering - When a stock is officially available for the public to buy.

Inside Day - A day in which the daily price range is completely within the previous day's daily price range.

Instrument - A formal legal document in writing, e.g. a bill of exchange.

Interest Rate Swaps - An arrangement that requires both sides of the transaction to make payments to each other based on two different interest rates.

Intermarket Analysis - Observing the price movement of one market for the purpose of evaluating a different market.

Investment Clubs - Small, private organizations in which a group of investors, usually novices, pool their time and resources to learn more than they could on their own about various forms of investments and then invest their own money as a group.

IRA - Individual Retirement Account.

ISO 9000 - Certification that an exporter meets ISO 9000 manufacturing standards, for example, may be a minimum requirement for competing in certain markets or for certain tenders.

Issuing (or Opening) Bank - The buyer’s bank which establishes a documentary credit at the request of the buyer, in favour of the beneficiary (seller/exporter).