Letter of Guarantee


Also found in: Acronyms.

Letter of Guarantee

A letter from a bank to a brokerage firm which states that a customer (who has written a call option) does indeed own the underlying stock and the bank will guarantee delivery if the call is assigned. Thus the call can be considered covered. Not all brokerage firms accept letters of guarantee. Also: letter issued to Option Clearing Corporation by member firms covering a guarantee of any trades made by one of its customers, (a trader or broker on the exchange floor).
Copyright © 2012, Campbell R. Harvey. All Rights Reserved.

Letter of Guarantee

In call options, a guarantee of delivery of securities made by a bank to a brokerage on behalf of the bank's client. When an investor is writing a call option and does not have the underlying asset in his/her brokerage account, the brokerage may require a letter of guarantee in order to eliminate the risk that the investor will not deliver the securities should the call be exercised.
Farlex Financial Dictionary. © 2012 Farlex, Inc. All Rights Reserved

letter of guarantee

A letter from a bank stating that a customer owns a particular security and that the bank will guarantee delivery of the security. A letter of guarantee is used by an investor who is writing call options when the underlying stock is not in his or her brokerage account.
Wall Street Words: An A to Z Guide to Investment Terms for Today's Investor by David L. Scott. Copyright © 2003 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. All rights reserved.
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