barriersensbybls

Calculate price or sensitivities for European barrier options using Black-Scholes option pricing model

Syntax

PriceSens = barriersensbybls(RateSpec,StockSpec,OptSpec,Strike,Settle,ExerciseDates,BarrierSpec,Barrier)

PriceSens = barriersensbybls(___,Name,Value)

Description

PriceSens = barriersensbybls(RateSpec,StockSpec,OptSpec,Strike,Settle,ExerciseDates,BarrierSpec,Barrier) calculates European barrier option prices or sensitivities using the Black-Scholes option pricing model.

PriceSens = barriersensbybls(___,Name,Value) adds optional name-value pair arguments.

Examples

Calculate Price and Sensitivities for European Barrier Down Out and Down In Call Options

Compute price of European barrier down out and down in call options using the following data:

Rates = 0.035;
Settle = '01-Jan-2015';
Maturity = '01-April-2015';
Compounding = -1;
Basis = 1;

Define a RateSpec.

 RateSpec = intenvset('ValuationDate', Settle, 'StartDates', Settle, 'EndDates', Maturity, ...
     'Rates', Rates, 'Compounding', Compounding, 'Basis', Basis)

RateSpec = struct with fields:
           FinObj: 'RateSpec'
      Compounding: -1
             Disc: 0.9913
            Rates: 0.0350
         EndTimes: 0.2500
       StartTimes: 0
         EndDates: 736055
       StartDates: 735965
    ValuationDate: 735965
            Basis: 1
     EndMonthRule: 1

Define a StockSpec.

AssetPrice = 19;
Volatility = 0.40;
DivType = 'Continuous'; 
DivAmount = 0.035;
StockSpec = stockspec(Volatility, AssetPrice, DivType, DivAmount)

StockSpec = struct with fields:
             FinObj: 'StockSpec'
              Sigma: 0.4000
         AssetPrice: 19
       DividendType: {'continuous'}
    DividendAmounts: 0.0350
    ExDividendDates: []

Calculate the price, delta, and gamma for European barrier down out and down in call options using the Black-Scholes option pricing model.

OptSpec = 'Call';
Strike = 20;
Barrier = 18;
BarrierSpec = {'DO';'DI'};
OutSpec = {'price', 'delta', 'gamma'};

[Price, Delta, Gamma] = barriersensbybls(RateSpec, StockSpec, OptSpec, Strike, Settle,...
Maturity,  BarrierSpec, Barrier,'OutSpec', OutSpec)

Price = 2×1

    0.6287
    0.4655

Delta = 2×1

    0.6376
   -0.2036

Gamma = 2×1

    0.0255
    0.0773

Input Arguments

RateSpec — Interest-rate term structure

structure

Interest-rate term structure (annualized and continuously compounded), specified by the RateSpec obtained from intenvset. For information on the interest-rate specification, see intenvset.

Data Types: struct

StockSpec — Stock specification for underlying asset

structure

Stock specification for the underlying asset. For information on the stock specification, see stockspec.

stockspec handles several types of underlying assets. For example, for physical commodities the price is StockSpec.Asset, the volatility is StockSpec.Sigma, and the convenience yield is StockSpec.DividendAmounts.

Data Types: struct

OptSpec — Definition of option

character vector with values 'call' or 'put' | string array with values "call" or "put"

Definition of the option as 'call' or 'put', specified as an NINST-by-1 cell array of character vectors or string arrays with values "call" or "put".

Data Types: char | string | cell

Strike — Option strike price value

numeric

Option strike price value, specified as an NINST-by-1 matrix of numeric values.

Data Types: double

Settle — Settlement or trade date

serial date number | date character vector | datetime object

Settlement or trade date for the barrier option, specified as an NINST-by-1 matrix using serial date numbers, date character vectors, or datetime objects.

Data Types: double | char | datetime

ExerciseDates — Option exercise dates

serial date number | date character vector | datetime object

Option exercise dates, specified as an NINST-by-1 matrix of serial date numbers, date character vectors, or datetime objects.

Note

For a European option, there is only one ExerciseDates on the option expiry date which is the maturity of the instrument.

Data Types: double | char | datetime

BarrierSpec — Barrier option type

character vector with values: 'UI', 'UO', 'DI', 'DO'

Barrier option type, specified as an NINST-by-1 cell array of character vectors with the following values:

• 'UI' — Up Knock-in

  This option becomes effective when the price of the underlying asset passes above the barrier level. It gives the option holder the right, but not the obligation, to buy or sell (call/put) the underlying security at the strike price if the underlying asset goes above the barrier level during the life of the option.

• 'UO' — Up Knock-out

  This option gives the option holder the right, but not the obligation, to buy or sell (call/put) the underlying security at the strike price as long as the underlying asset does not go above the barrier level during the life of the option. This option terminates when the price of the underlying asset passes above the barrier level. Usually with an up-and-out option, the rebate is paid if the spot price of the underlying reaches or exceeds the barrier level.

• 'DI' — Down Knock-in

  This option becomes effective when the price of the underlying stock passes below the barrier level. It gives the option holder the right, but not the obligation, to buy or sell (call/put) the underlying security at the strike price if the underlying security goes below the barrier level during the life of the option. With a down-and-in option, the rebate is paid if the spot price of the underlying does not reach the barrier level during the life of the option.

• 'DO' — Down Knock-up

  This option gives the option holder the right, but not the obligation, to buy or sell (call/put) the underlying asset at the strike price as long as the underlying asset does not go below the barrier level during the life of the option. This option terminates when the price of the underlying security passes below the barrier level. Usually, the option holder receives a rebate amount if the option expires worthless.

Option	Barrier Type	Payoff if Barrier Crossed	Payoff if Barrier not Crossed
Call/Put	Down Knock-out	Worthless	Standard Call/Put
Call/Put	Down Knock-in	Call/Put	Worthless
Call/Put	Up Knock-out	Worthless	Standard Call/Put
Call/Put	Up Knock-in	Standard Call/Put	Worthless

Data Types: char | cell

Barrier — Barrier level

numeric

Barrier level, specified as an NINST-by-1 matrix of numeric values.

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 quotes. You can specify several name and value pair arguments in any order as Name1,Value1,...,NameN,ValueN.

Example: Price = barriersensbybls(RateSpec,StockSpec,OptSpec,Strike,Settle,Maturity,BarrierSpec,Barrier,'Rebate',1000,'OutSpec','Delta')

'Rebate' — Rebate values

0 (default) | numeric

Rebate values, specified as the comma-separated pair consisting of 'Rebate' and NINST-by-1 matrix of numeric values. For Knock-in options, the Rebate is paid at expiry. For Knock-out options, the Rebate is paid when the Barrier is reached.

Data Types: double

'OutSpec' — Define outputs

{'Price'} (default) | character vector with values 'Price', 'Delta', 'Gamma', 'Vega', 'Lambda', 'Rho', 'Theta', and 'All' | cell array of character vectors with values 'Price', 'Delta', 'Gamma', 'Vega', 'Lambda', 'Rho', 'Theta', and 'All'

Define outputs, specified as the comma-separated pair consisting of 'OutSpec' and a NOUT- by-1 or a 1-by-NOUT cell array of character vectors with possible values of 'Price', 'Delta', 'Gamma', 'Vega', 'Lambda', 'Rho', 'Theta', and 'All'.

OutSpec = {'All'} specifies that the output is Delta, Gamma, Vega, Lambda, Rho, Theta, and Price, in that order. This is the same as specifying OutSpec to include each sensitivity.

Example: OutSpec = {'delta','gamma','vega','lambda','rho','theta','price'}

Data Types: char | cell

Output Arguments

PriceSens — Expected prices or sensitivities for barrier options

matrix

Expected prices at time 0 or sensitivities (defined using OutSpec) for barrier options, returned as a NINST-by-1 matrix.

More About

Barrier Option

A Barrier option has not only a strike price but also a barrier level and sometimes a rebate.

A rebate is a fixed amount that is paid if the option cannot be exercised because the barrier level has been reached or not reached. The payoff for this type of option depends on whether the underlying asset crosses the predetermined trigger value (barrier level), indicated by Barrier, during the life of the option. For more information, see Barrier Option.

References

[1] Hull, J. Options, Futures and Other Derivatives Fourth Edition. Prentice Hall, 2000, pp. 646–649.

[2] Aitsahlia, F., L. Imhof, and T.L. Lai. “Pricing and hedging of American knock-in options.” The Journal of Derivatives. Vol. 11.3, 2004, pp. 44–50.

[3] Rubinstein M. and E. Reiner. “Breaking down the barriers.” Risk. Vol. 4(8), 1991, pp. 28–35.