Maintenance Margin
The minimum margin which an investor must keep on deposit in a margin account at all times in respect of each open contract.

Make A Market
A dealer is said to make a market when he or she quotes bid and offer prices at which he or she stands ready to buy and sell.

Managed Float
When the monetary authorities intervene regularly in the market to stabilize the rates or to aim the exchange rate in a required direction.

Margin Call
A claim by one's broker or dealer for additional good faith performance monies usually issued when an investor's account suffers adverse price movements.

Margin
Cash or guarantee deposited by a client wishing to trade.

Mark To Market
The daily adjustment of an account to reflect accrued profits and losses often required to calculate variations of margins.

Market Maker
A market maker is a person or firm authorized to create and maintain a market in an instrument.

Market Order
An order to buy or sell a financial instrument immediately at the best possible price.

Maturity
Date for settlement

Micro Economics
The study of economic activity as it applies to individual firms or well defined small groups of individuals or economic sectors.

Mid-Price Or Middle Rate
The price half-way between the two prices, or the average of both buying and selling prices offered by the market makers.

Minimum Price Fluctuation
The smallest increment of market price movement possible in a given futures contract.

Monetary Base
Currency in circulation plus banks' required and excess deposits at the central bank.

Moving Average
A way of smoothing a set of data, widely used in price time series.