margin requirement

In finance, a margin is collateral that the holder of a position in securities, options, or futures contracts has to deposit to cover the credit risk of his counterparty. This risk can arise if the holder has done any of the following:borrowed cash from the counterparty to buy securities or options,sold securities or options short, orentered into a futures contract. The collateral can be in the form of cash or securities, and it is deposited in a margin account. On U.S. futures exchanges, margin is formally called performance bond.
See more at Wikipedia.org...

The amount of cash an uncovered (naked ) option writer is required to deposit and maintain to cover his daily position valuation and reasonably foreseeable intra-day price changes.

Margin requirement
(Econ) Yêu cầu về mức chênh lệch.+ Là tỷ lệ giá trị thị trường của 1 chứng khoán mà người mua có thể vay được khi mua chứng khoán đó.
(C) 2007 www.TừĐiểnTiếngViệt.net