ECN

Electronic Communication Network. ECNs are expected to supplement or even replace conventional stock exchanges over the next one to two years.

Cash

A special term attached to an equity order that requires the trade to be settled either the same day or the following business day for cash.

Fill or Kill (FOK) Order

A tradable limit order marked “FOK” will trade as much stock as possible upon entry, but will immediately cancel or kill any unfilled volume.

Equities

Common and preferred stocks, which represent a share in the ownership of a company.

Demand

The combined desire, ability and willingness on the part of consumers to buy goods or services. Demand is determined by income and by price, which are, in part, determined by supply.

Box Spread

Option arbitrage in which a profitable position is established with no risk. One spread is established with call options. The other spread is established using put options.