Accelerating the pace of engineering and science

Documentation Center

• Trial Software

optfloatbybdt

Price options on floating-rate notes for BDT interest-rate tree

Syntax

• [Price,PriceTree] = optfloatbybdt(___)
• Price = optfloatbybdt(___, Name,Value)
• [Price,PriceTree] = optfloatbybdt(___)

Description

example

Price = optfloatbybdt(BDTTree,OptSpec,Strike,ExerciseDates,AmericanOpt,
returns the option price of the instrument(s) at valuation date.

Price = optfloatbybdt(BDTTree,OptSpec,Strike,ExerciseDates,AmericanOpt,
returns the option price of the instrument(s) at valuation date using optional arguments.

[Price,PriceTree] = optfloatbybdt(___) returns the option price of the instrument(s) at valuation date and a structure of trees containing vectors of option prices at each node.

Price = optfloatbybdt(BDTTree,OptSpec,Strike,ExerciseDates,AmericanOpt,
returns the option price of the instrument(s) at valuation date.

Price = optfloatbybdt(___, Name,Value) returns the option price of the instrument(s) at valuation date using optional Name-Value pairs.

[Price,PriceTree] = optfloatbybdt(___) returns the option price of the instrument(s) at valuation date and a structure of trees containing vectors of option prices at each node using optional name-value pair arguments.

Examples

expand all

Compute the Price of American Call and Put Options on a Floating-Rate Note

Define the interest-rate term structure.

```Rates = [0.03;0.034;0.038;0.04];
ValuationDate = 'Jan-1-2012';
StartDates = ValuationDate;
EndDates = {'Jan-1-2013'; 'Jan-1-2014'; 'Jan-1-2015'; 'Jan-1-2016'};
Compounding = 1;```

Create the RateSpec.

```RateSpec = intenvset('ValuationDate', ValuationDate, 'StartDates', StartDates,...
'EndDates', EndDates, 'Rates', Rates, 'Compounding', Compounding)```
```RateSpec =

FinObj: 'RateSpec'
Compounding: 1
Disc: [4x1 double]
Rates: [4x1 double]
EndTimes: [4x1 double]
StartTimes: [4x1 double]
EndDates: [4x1 double]
StartDates: 734869
ValuationDate: 734869
Basis: 0
EndMonthRule: 1```

Build the BDT tree and assume a volatility of 10%.

```Sigma = 0.1;
BDTTimeSpec = bdttimespec(ValuationDate, EndDates);
BDTVolSpec = bdtvolspec(ValuationDate, EndDates, Sigma*ones(1, length(EndDates))');
BDTT = bdttree(BDTVolSpec, RateSpec, BDTTimeSpec)```
```BDTT =

FinObj: 'BDTFwdTree'
VolSpec: [1x1 struct]
TimeSpec: [1x1 struct]
RateSpec: [1x1 struct]
tObs: [0 1 2 3]
dObs: [734869 735235 735600 735965]
TFwd: {[4x1 double]  [3x1 double]  [2x1 double]  [3]}
CFlowT: {[4x1 double]  [3x1 double]  [2x1 double]  [4]}
FwdTree: {1x4 cell}```

The floater instrument has a spread of 10, a period of one year, and matures on Jan-1-2016.

```Spread = 10;
Settle = 'Jan-1-2012';
Maturity =  'Jan-1-2016';
Period = 1;```

Define the option for the floating-rate note.

```OptSpec = {'call'; 'put'};
Strike = [100;101];
ExerciseDates = 'Jan-1-2015';
AmericanOpt = 1;```

Compute the price of the call and put options.

```Price= optfloatbybdt(BDTT,  OptSpec, Strike, ExerciseDates,AmericanOpt, Spread,...
Settle, Maturity)```
```Price =

0.3655
0.8087```

Input Arguments

expand all

BDTTree — Interest-rate tree structurebinomial tree structure

Interest-rate tree specified as a structure by using bdttree.

Data Types: struct

OptSpec — Definition of option string | cell array of strings

Definition of option as 'call' or 'put' specified as a NINST-by-1 cell array of strings for 'call' or 'put'.

Data Types: cell | char

Strike — Option strike price valuesnonnegative integer | vector of nonnegative integers

Option strike price values specified nonnegative integers using as NINST-by-NSTRIKES vector of strike price values.

Data Types: single | double

ExerciseDates — Exercise date for option (European, Bermuda, or American) nonnegative integer | vector of nonnegative integers

Exercise date for option (European, Bermuda, or American) specified as nonnegative integers using a NINST-by-NSTRIKES or NINST-by-2 vector of for the option exercise dates.

• If a European or Bermuda option, the ExerciseDates is a 1-by-1 (European) or 1-by-NSTRIKES (Bermuda) vector of exercise dates. For a European option, there is only one ExerciseDate on the option expiry date.

• If an American option, then ExerciseDates is a 1-by-2 vector of exercise date boundaries. The option exercises on any date between or including the pair of dates on that row. If there is only one non-NaN date, or if ExerciseDates is 1-by-1, the option exercises between the Settle date and the single listed ExerciseDate.

Data Types: char | cell

AmericanOpt — Option typescalar | vector of positive integers[0,1]

Option type specified as NINST-by-1 positive integer scalar flags with values:

• 0 — European/Bermuda

• 1 — American

Data Types: single | double

Spread — Number of basis points over the reference ratenonnegative integer | vector of nonnegative integers

Number of basis points over the reference rate specified as a vector nonnegative integers for the number of instruments (NINST)-by-1).

Data Types: single | double

Settle — Settlement dates of floating-rate noteValuationDate of HW Tree (default) | nonnegative integer | vector of nonnegative integers

Settlement dates of floating-rate note specified as nonnegative integers using a NINST-by-1 vector of dates.

 Note:   The Settle date for every floating-rate note is set to the ValuationDate of the HW Tree. The floating-rate note argument Settle is ignored.

Data Types: char

Maturity — Floating-rate note maturity datenonnegative integer | vector of nonnegative integers

Floating-rate note maturity date specified as nonnegative integers using a NINST-by-1 vector of dates.

Data Types: char

Reset — (Optional) Frequency of payments per year1 (default) | positive integer from the set[1,2,3,4,6,12] | vector of positive integers from the set [1,2,3,4,6,12]

Frequency of payments per year specified as positive integers for the values [1,2,3,4,6,12] in a NINST-by-1 vector.

 Note:   Payments on floating-rate notes (FRNs) are determined by the effective interest-rate between reset dates. If the reset period for a FRN spans more than one tree level, calculating the payment becomes impossible due to the recombining nature of the tree. That is, the tree path connecting the two consecutive reset dates can not be uniquely determined because there will be more than one possible path for connecting the two payment dates.

Data Types: double

Basis — (Optional) Day-count basis of the instrument0 (actual/actual) (default) | positive integers of the set [1...13] | vector of positive integers of the set [1...13]

Day-count basis of the instrument specified as a positive integer using a NINST-by-1 vector. The Basis value represents the basis used when annualizing the input forward-rate tree.

• 0 = actual/actual

• 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)

• 13 = BUS/252

Data Types: double

Principal — (Optional) Principal values100 (default) | nonnegative integer | vector of nonnegative integers

Principal values specified as a nonnegative integer using a NINST-by-1 vector of notional principal amounts.

Data Types: double

Options — (Optional) Structure containing derivatives pricing optionsstructure

Structure containing derivatives pricing options specified using derivset.

Data Types: struct

EndMonthRule — (Optional) End-of-month rule flag1 (in effect) (default) | nonnegative integer [0,1]

End-of-month rule flag is specified as nonnegative integer [0, 1] using a NINST-by-1 vector. This rule applies only when Maturity is an end-of-month date for a month having 30 or fewer days.

• 0 = Ignore rule, meaning that a bond coupon payment date is always the same numerical day of the month.

• 1 = Set rule on, meaning that a bond coupon payment date is always the last actual day of the month.

Data Types: double

Name-Value Pair Arguments

Specify optional comma-separated pairs of Name,Value arguments. Name is the argument name and Value is the corresponding value. Name must appear inside single quotes (' '). You can specify several name and value pair arguments in any order as Name1,Value1,...,NameN,ValueN.

'Reset' — Frequency of payments per year1 (default) | positive integer from the set[1,2,3,4,6,12] | vector of positive integers from the set [1,2,3,4,6,12]

Frequency of payments per year specified as positive integers for the values 1,2,3,4,6,12] in a NINST-by-1 vector.

 Note:   Payments on floating-rate notes (FRNs) are determined by the effective interest-rate between reset dates. If the reset period for a FRN spans more than one tree level, calculating the payment becomes impossible due to the recombining nature of the tree. That is, the tree path connecting the two consecutive reset dates can not be uniquely determined because there will be more than one possible path for connecting the two payment dates.

Data Types: char

'Basis' — Day-count basis of the instrument0 (actual/actual) (default) | positive integers of the set [1...13] | vector of positive integers of the set [1...13]

Day-count basis of the instrument specified as a positive integer using a NINST-by-1 vector. The Basis value represents the basis used when annualizing the input forward-rate tree.

• 0 = actual/actual

• 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)

• 13 = BUS/252

Data Types: char

'Principal' — Principal values100 (default) | nonnegative integer | vector of nonnegative integers

Principal values specified as a nonnegative integer using a NINST-by-1 vector of notional principal amounts.

Data Types: char

'Options' — Structure containing derivatives pricing optionsstructure

Structure containing derivatives pricing options specified using derivset.

Data Types: struct

'EndMonthRule' — End-of-month rule flag1 (in effect) (default) | nonnegative integer [0,1]

End-of-month rule flag is specified as a nonnegative integer [0, 1] using a NINST-by-1 vector. This rule applies only when Maturity is an end-of-month date for a month having 30 or fewer days.

• 0 = Ignore rule, meaning that a bond coupon payment date is always the same numerical day of the month.

• 1 = Set rule on, meaning that a bond coupon payment date is always the last actual day of the month.

Data Types: char

Output Arguments

expand all

Price — Expected prices of the floating-rate note option at time 0scalar | vector

Expected prices of the floating-rate note option at time 0 is returned as a scalar or an NINST-by-1 vector.

PriceTree — Structure of trees containing vectors of option prices at each node tree structure

Structure of trees containing vectors of instrument prices and accrued interest and a vector of observation times for each node returned as:

• PriceTree.PTree contains option prices.