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・ Interest expense
・ Interest Fair
・ Interest Flooding Attack
・ Interest graph
・ Interest group (disambiguation)
・ Interest group democracy
・ Interest group liberalism
・ Interest in possession trust
・ Interest in securities
・ Interest of the company
・ Interest on Lawyer Trust Accounts
・ Interest on past due child support
・ Interest point detection
・ Interest Project
・ Interest rate
Interest rate cap and floor
・ Interest rate channel
・ Interest rate derivative
・ Interest rate future
・ Interest rate guarantee
・ Interest rate insurance
・ Interest rate option
・ Interest rate parity
・ Interest rate risk
・ Interest rate swap
・ Interest sensitivity gap
・ Interest Tax Act, 1974
・ Interest-driven activities
・ Interest-only loan
・ Interested Parties Information


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Interest rate cap and floor : ウィキペディア英語版
Interest rate cap and floor
An interest rate cap is a derivative in which the buyer receives payments at the end of each period in which the interest rate exceeds the agreed strike price. An example of a cap would be an agreement to receive a payment for each month the LIBOR rate exceeds 2.5%.
Similarly an interest rate floor is a derivative contract in which the buyer receives payments at the end of each period in which the interest rate is below the agreed strike price.
Caps and floors can be used to hedge against interest rate fluctuations. For example, a borrower who is paying the LIBOR rate on a loan can protect himself against a rise in rates by buying a cap at 2.5%. If the interest rate exceeds 2.5% in a given period the payment received from the derivative can be used to help make the interest payment for that period, thus the interest payments are effectively "capped" at 2.5% from the borrowers point of view.
==Interest rate cap==
An interest rate cap is a derivative in which the buyer receives payments at the end of each period in which the interest rate exceeds the agreed strike price. An example of a cap would be an agreement to receive a payment for each month the LIBOR rate exceeds 2.5%.
The interest rate cap can be analyzed as a series of European call options or caplets which exist for each period the cap agreement is in existence.
In mathematical terms, a caplet payoff on a rate ''L'' struck at ''K'' is
: N\cdot\alpha\max(L-K,0)
where ''N'' is the notional value exchanged and '' \alpha '' is the day count fraction corresponding to the period to which ''L'' applies. For example, suppose you own a caplet on the six month USD LIBOR rate with an expiry of 1 February 2007 struck at 2.5% with a notional of 1 million dollars. Then if the USD LIBOR rate sets at 3% on 1 February you receive
$1M\cdot 0.5\cdot \max(0.03-0.025, 0) = $2500
Customarily the payment is made at the end of the rate period, in this case on 1 August.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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