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| Account | A record of financial transactions for an individual at a bank or a brokerage company
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| Account Executive | An individual who usually works for a brokerage company and has the legal power to buy or sell financial instruments on behalf of a client
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| Activity | The volume of financial instruments over a given period of time
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| Aggregate Demand | The total demand for goods and services produced in the economy over a period of time. This includes consumer demand of durable and nondurable items, investment spending by companies on capital goods, government spending on publicly provided goods and services, and the difference between exports and imports of goods and services of the country
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| Aggregate Supply | A measure of the total supply of goods and services produced within the economy from domestic sources that are available to meet aggregate demand
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| All or None | A Futures order that instructs the broker to either fill the whole order or not at all
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| Alpha | A coefficient measuring the risk-adjusted performance of a currency or stock option. A large alpha indicates that the underlying has performed better than would be predicted given its beta (volatility)
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| American Option | An option that may be exercised at any time prior to expiration, as opposed to a European option that can only be exercised on a specific date (usually at expiration)
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| Arbitrage | The simultaneous purchase and sale of the same (or equivalent) financial instrument on different markets to profit from price discrepancies
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| Ask | The price at which the currency or instrument is offered
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| At Best | Instructions given to a dealer to buy or sell the currency or instrument at the best rate that can be obtained
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| At or Better | Instructions given to a dealer to buy or sell the currency or instrument at a specific rate or better
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| At the Market | A buy or sell order that must be executed at the best price currently available in the market. These are also called market orders
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| At-the-Money | An option whose strike / exercise price is equal to or near the current market price of the underlying instrument
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| Away from the Market | On limit orders, a buy order away from the market would be placed lower than the current market price, and sell orders would be placed higher than the current market price. Such orders are usually held to be executed later
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