Fixed-Income Toolbox™bkcaplet   bkput
  

bkfloorlet - Price interest rate floorlet using Black's model

Syntax 

FloorPrices = bkfloorlet(FloorData, FwdRates, ZeroPrice, Settle, 
StartDate, EndDate, Sigma)

Arguments

FloorData

Number of floors (NFLR)-by-2 matrix containing floor rates and bases: [FloorRate Basis].

Values for bases may be:

  • 0 = actual/actual (default)

  • 1 = 30/360 (SIA)

  • 2 = actual/360

  • 3 = actual/365

  • 4 = 30/360 (PSA)

  • 5 = 30/360 (ISDA)

  • 6 = 30/360 (European)

  • 7 = actual/365 (Japanese)

  • 8 = actual/actual (ISMA)

  • 9 = actual/360 (ISMA)

  • 10 = actual/365 (ISMA)

  • 11 = 30/360E (ISMA)

  • 12 = actual/365 (ISDA)

FwdRates

Scalar or NFLR-by-1 vector containing forward rates in decimal. FwdRates accrue on the same basis as FloorRates.

ZeroPrice

Scalar or NFLR-by-1 vector containing zero coupon prices with maturities corresponding to those of each floor in FloorData, per $100 nominal value.

Settle

Scalar or NFLR-by-1 vector of identical elements containing settlement date of floorlets.

StartDate

Scalar or NFLR-by-1 vector containing start dates of the floorlets.

EndDate

Scalar or NFLR-by-1 vector containing maturity dates of floorlets.

Sigma

Scalar or NFLR-by-1 vector containing volatility of forward rates in decimal, corresponding to each floorlet.

Description

FloorPrices = bkfloorlet(FloorData, FwdRates, ZeroPrice, Settle, StartDate, EndDate, Sigma) computes the prices of interest rate floorlets for every $100 of notional value.

Examples

Given a notional amount of $1,000,000, compute the value of a floorlet on October 15, 2002 that starts on October 15, 2003 and ends on January 15, 2004.

FloorData = [0.08, 1];
FwdRates = 0.07;
ZeroPrice = 100*exp(-0.065*1.25);
Settle = datenum('15-Oct-2002');
BeginDates = datenum('15-Oct-2003');
EndDates = datenum('15-Jan-2004');
Sigma = 0.20;
  
% Because floorlet is $100 notional, divide $1,000,000 by $100.
Notional = 1000000/100; 
 
FloorPrice = Notional*bkfloorlet(FloorData, FwdRates, ...
ZeroPrice, Settle, BeginDates, EndDates, Sigma)     
 
FloorPrice =

       2823.91

See Also

bkcaplet

  

bkcapletbkcaplet bkputbkput

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