barriersensbybls
Calculate price or sensitivities for European barrier options using BlackScholes option pricing model
Syntax
Description
calculates European barrier option prices or sensitivities using the BlackScholes
option pricing model.PriceSens
= barriersensbybls(RateSpec
,StockSpec
,OptSpec
,Strike
,Settle
,ExerciseDates
,BarrierSpec
,Barrier
)
Note
Alternatively, you can use the Barrier
object to calculate price or sensitivities for Barrier options. For more
information, see Get Started with Workflows Using ObjectBased Framework for Pricing Financial Instruments.
adds optional namevalue pair arguments. PriceSens
= barriersensbybls(___,Name,Value
)
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 = '01Jan2015'; Maturity = '01April2015'; 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 BlackScholes 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
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
by1
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
by1
matrix of numeric values.
Data Types: double
Settle
— Settlement or trade date
datetime array  string array  date character vector  serial date number
Settlement or trade date for the barrier option, specified as an
NINST
by1
vector using a datetime
array, string array, date character vectors, or serial date numbers.
Data Types: double
 char
 string
 datetime
ExerciseDates
— Option exercise dates
datetime array  string array  date character vector  serial date number
Option exercise dates, specified as an
NINST
by1
vector using a datetime
array, string array, date character vectors, or serial date numbers.
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
 string
 datetime
BarrierSpec
— Barrier option type
character vector with values: 'UI'
, 'UO'
, 'DI'
, 'DO'
Barrier option type, specified as an NINST
by1
cell
array of character vectors with the following values:
'UI'
— Up KnockinThis 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 KnockoutThis 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 upandout option, the rebate is paid if the spot price of the underlying reaches or exceeds the barrier level.
'DI'
— Down KnockinThis 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 downandin 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 KnockupThis 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 Knockout  Worthless  Standard Call/Put 
Call/Put  Down Knockin  Call/Put  Worthless 
Call/Put  Up Knockout  Worthless  Standard Call/Put 
Call/Put  Up Knockin  Standard Call/Put  Worthless 
Data Types: char
 cell
Barrier
— Barrier level
numeric
Barrier level, specified as an
NINST
by1
matrix of numeric
values.
Data Types: double
NameValue Arguments
Specify optional pairs of arguments as
Name1=Value1,...,NameN=ValueN
, where Name
is
the argument name and Value
is the corresponding value.
Namevalue arguments must appear after other arguments, but the order of the
pairs does not matter.
Before R2021a, use commas to separate each name and value, and enclose
Name
in quotes.
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 commaseparated pair consisting of
'Rebate'
and
NINST
by1
matrix of numeric
values. For Knockin options, the Rebate
is paid at
expiry. For Knockout 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 commaseparated pair consisting of
'OutSpec'
and a NOUT

by1
or a
1
byNOUT
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
by1
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 knockin 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.
Version History
Introduced in R2016b
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