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Implied volatility
A measurement of the market’s expected price range of the underlying commodity futures based on the market-traded option premiums.
A number that measures changes in financial markets. Some indexes are used as benchmarks that financial performance is measured against.
Indexed bond
A bond whose payments are linked by an index (such as a consumer-price index).
Index-linked gilt
A gilt, the interest and capital of which change in line with the Retail Price Index.
Indicative quote
A market-maker's price which is not firm.
Swiss or German bearer shares.
Initial margin
The margin required to secure a new futures or options position.
Initial public offering (IPO)
A company's first sale of stock to the public. Companies making an IPO are seeking outside equity capital and a public market for their stock.
Inside information
Inside information is information of a precise nature which has not been made public, relating, directly or indirectly, to one or more issuers of financial instruments or to one or more financial instruments and which, if it were made public, would be likely to have a significant effect on the prices of those financial instruments or on the price of related derivative financial instruments.
Inside spread (Inside quote)
The difference between the best bid and best ask being quoted among all of the market makers competing in a security. Since the inside spread is the aggregate of individual market maker spreads, it is narrower than an individual dealer spread or quote. (See Market maker)