TwoAssetBarrier





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In a two-asset barrier option, one of the underlying assets, S1, determines how much the option is in or out-of-the-money, and the other asset, S2, is linked to barrier hits.

The option is knocked in or out if asset S2 hits the Barrier H during the option period, while the payoff depends on asset S1 and the strike price X. This function utilizes an analytical (closed-form) algorithm.

Note that the risk (greek) numbers produced are the mathematically defined equivalent of a derivative (instantaneous change).

You can convert the risk number to your own definition of risk by multiplying by the shift you require.

For example, for a typical definition of VANNA, (change in underlying and volatility), where one defines the change in the underlying as a single unit of change (1.0) and the change in volatility as a one percent change (0.01), simply multiply the VANNA result calculated by (1.0*0.01).

For VEGA, change in volatility of one percent (0.01), simply multiply the VEGA result by 0.01. Within option contracts THETA is negative, however the mathematically defined equivalent of THETA (instantaneous FORWARD change in time) is positive.

Internally we have negated this value for you.

To express THETA as THETA per day, simply multiply the THETA result by 1/365 or 1/252 (depending on whether you require calendar days or business days).



Note: Within Excel, the function is named - CT.EXO.TwoAssetBarrier




High level graphic of TwoAssetBarrier() function with parameters. Blue square node is the actual function with the parameters ordered.



Parameter Description


  1. ValueDate parameter

    Valuation Date (typically equal to Today's date)
  2. dayCounter parameter

    For any input parameter within this function that represents a dividend rate, risk free rate, foreign rate or holding cost rate, these rates will be defined as annually compounded using the DayCounter defined within this parameter. Thus if 'actual365' is used for this 'dayCounter' parameter, then all input parameters that represent a dividend, risk free, foreign or holding cost rates will be defined as annually compounded Actual365 rates.
  3. TypeFlag parameter

    Option Types cdi, cui, pdi, pui, cdo,cuo, pdo, puo
  4. S1 parameter

    Underlying1 price
  5. S2 parameter

    Underlying2 price
  6. X parameter

    Strike price of the option
  7. H parameter

    Continuous Barrier level
  8. AdjBarrFreq parameter

    Monitoring frequency that you wish the continuous barrier level value entered to have. (Basically will convert the barrier from continuous to discrete. If you choose 'Continuously', the barrier will still be a Continuous barrier). Valid values are : Continuously, Hourly, Daily, Weekly or Monthly.
  9. T parameter

    Time to option maturity.
  10. r parameter

    For the underlying (equity, futures, FX or commodity), this should be an annualised rate (risk free rate or foreign rate). If this is an option on a FX underlying, then if the underlying is quoted as domestic/foreign then this rate will be the domestic rate. If, however, the FX underlying is quoted as foreign/domestic then this will be the foreign rate.
  11. b1 parameter

    For the first underlying (equity, futures, FX or commodity), this should be an annualised rate (dividend rate, risk free rate, foreign rate or holding cost rate respectively). If this is an option on a FX underlying, then if the underlying is quoted as domestic/foreign then this rate will be the foreign rate. If, however, the FX underlying is quoted as foreign/domestic then this will be the domestic rate.
  12. b2 parameter

    For the second underlying (equity, futures, FX or commodity), this should be an annualised rate (dividend rate, risk free rate, foreign rate or holding cost rate respectively). If this is an option on a FX underlying, then if the underlying is quoted as domestic/foreign then this rate will be the foreign rate. If, however, the FX underlying is quoted as foreign/domestic then this will be the domestic rate.
  13. v1 parameter

    Volatility of the first underlying.
  14. v2 parameter

    Volatility of the second underlying.
  15. rho parameter

    Correlation between the two assets.
  16. Greek parameter

    For the option premium specify 'PREMIUM'. For all first derivatives, you can specify one of the following : 'dS1' (for the 'S1' parameter), 'dS2' (for the 'S2' parameter), 'dX' (for the 'X' parameter), 'dH' (for the 'H' parameter), 'dT' (for the 'T' parameter), 'dr' (for the 'r' parameter), 'db1' (for the 'b1' parameter), 'db2' (for the 'b2' parameter), 'dv1' (for the 'v1' parameter), 'dv2' (for the 'v2' parameter), 'drho' (for the 'rho' parameter), For second order derivatives, you can specify combinations of the first order derivatives (i.e. - 'dS1dS1', 'dv1dv1', 'dS1dv1'. )


Extended information

Function Syntax

VB Syntax


Double CTExoticOptions.TwoAssetBarrier( _
Long ValueDate, _
DayCountEnum dayCounter, _
String TypeFlag, _
Double S1, _
Double S2, _
Double X, _
Double H, _
String AdjBarrFreq, _
Long T, _
Double r, _
Double b1, _
Double b2, _
Double v1, _
Double v2, _
Double rho, _
String Greek)


Excel Spreadsheet Syntax


=CT.EXO.TwoAssetBarrier(
Excel Numeric Cell ValueDate,
Excel String Cell dayCounter,
Excel String Cell TypeFlag,
Excel Numeric Cell S1,
Excel Numeric Cell S2,
Excel Numeric Cell X,
Excel Numeric Cell H,
Excel String Cell AdjBarrFreq,
Excel Numeric Cell T,
Excel Numeric Cell r,
Excel Numeric Cell b1,
Excel Numeric Cell b2,
Excel Numeric Cell v1,
Excel Numeric Cell v2,
Excel Numeric Cell rho,
Excel String Cell Greek)


C++ Syntax


static double TwoAssetBarrier(
long ValueDate,
DayCountEnum dayCounter,
std::string TypeFlag,
double S1,
double S2,
double X,
double H,
std::string AdjBarrFreq,
long T,
double r,
double b1,
double b2,
double v1,
double v2,
double rho,
std::string Greek);


DotNET Syntax


System.Double CTExoticOptionsSA.TwoAssetBarrier(
System.Int32 ValueDate,
CTIEnums.DayCountEnum dayCounter,
System.String TypeFlag,
System.Double S1,
System.Double S2,
System.Double X,
System.Double H,
System.String AdjBarrFreq,
System.Int32 T,
System.Double r,
System.Double b1,
System.Double b2,
System.Double v1,
System.Double v2,
System.Double rho,
System.String Greek);

Parameter data types

ArgNameArgTypeIsKey
ValueDateLongFALSE
dayCounterDayCountEnumFALSE
TypeFlagStringFALSE
S1DoubleFALSE
S2DoubleFALSE
XDoubleFALSE
HDoubleFALSE
AdjBarrFreqStringFALSE
TLongFALSE
rDoubleFALSE
b1DoubleFALSE
b2DoubleFALSE
v1DoubleFALSE
v2DoubleFALSE
rhoDoubleFALSE
GreekStringFALSE


Example Inputs

The first column represents the name of the parameters. The second column specifies whether the parameters are optional or not. Finally the last column provides some sample input data.
Function call input string-keys are always in the format : "NAME.EXTTAG.TICKER" The "EXTTAG.TICKER" part is determined from the output of other, capetools, object creation functions.


ArgNameIsOptional (Excel only)Example
ValueDateFALSE19/Jul/2005 (serial date type)
dayCounterFALSEACT365
TypeFlagFALSEcdo
S1FALSE100.0
S2FALSE100.0
XFALSE95
HFALSE90
AdjBarrFreqFALSEDaily
TFALSE17/Jan/2006 (serial date type)
rFALSE0.08
b1FALSE0.00
b2FALSE0.00
v1FALSE0.2
v2FALSE0.2
rhoFALSE0.5
GreekFALSEPREMIUM


Example function usage


The C# example below contains all the sub-function calls leading up to this function call. As a result, the example can contain a lot of code.

The VB.NET, J#, C++.NET, Java, Excel VBA, Visual Basic 6 (via COM) and C++ examples below contain function code stubs for the calls leading up to this function call. However, the function call for this function is displayed.
You can easily reproduce the stub functions code from the C# example.


If you are accessing this functrion via the MiniXL libraries, this function is present within the CT.QL.Pricing20 MiniXL Excel Addin.

Within our Excel Example Addin Generator, we have used the following QuantTools sub-functions in order to prepare the arguments needed to call the TwoAssetBarrier() function. If you are executing this function via the MiniXL libraries, the module addin name, (in brackets, to the right of the sub-functions listed below), indicates the MiniXL library in which the sub-function is held. You will need to load this library into your Excel session (along with any other libraries that the sub-function call within the addin requires (ie - CT.QT.Utils20 addin in almost all cases) in order for the example to compute successfully.


The following four examples demostrate calling this function within a Microsoft .NET environment

The following four examples demostrate calling this function within a non .NET environment

The following is a sample output from executing the TwoAssetBarrier() function call


8.55704056992938

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