dbltouchbybls

Price double one-touch and double no-touch binary options using Black-Scholes option pricing model

Description

example

Price = dbltouchbybls(RateSpec,StockSpec,Settle,Maturity,BarrierSpec,Barrier,Payoff) calculates double one-touch and double no-touch binary options using Black-Scholes option pricing model.

Examples

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Compute the price of a double no-touch option using the following data:

AssetPrice = 105;
Rate = 0.1;
Volatility = 0.2;
Settle = '01-Jan-2018';
Maturity = '01-Jul-2018';

Define the RateSpec using intenvset.

RateSpec = intenvset('ValuationDate', Settle, 'StartDates', Settle, 'EndDates', ...
Maturity, 'Rates', Rate, 'Compounding', -1);

Define the StockSpec using stockspec.

DividendType = "Continuous";
DividendYield = Rate - 0.03;
StockSpec = stockspec(Volatility, AssetPrice, DividendType, DividendYield);

Calculate the price of a double no-touch binary option.

BarrierSpec = "DNT";
Barrier = [120 80];
Payoff = 10;
 
Price = dbltouchbybls(RateSpec, StockSpec, Settle, Maturity, BarrierSpec, Barrier, Payoff)
Price = 5.6368

Input Arguments

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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

Stock specification for the underlying asset, specified by the StockSpec obtained from 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

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

Data Types: double | char | datetime

Maturity date for the double touch option, specified as an NINST-by-1 vector of serial date numbers or date character vectors.

Data Types: double | char | cell

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

  • 'DOT' — Double one-touch. The double one-touch option defines two Barrier levels. A double one-touch option provides a Payoff if the underlying asset ever touches either the upper or lower Barrier levels.

  • 'DNT' — Double no-touch. The double no-touch option defines two Barrier levels. A double no-touch option provides a Payoff if the underlying asset ever never touches either the upper or lower Barrier levels.

Data Types: char | cell | string

Double barrier value, specified as an NINST-by-2 matrix of numeric values, where the first column is Upper Barrier(1)(UB) and the second column is Lower Barrier(2)(LB). Barrier(1) must be greater than Barrier(2).

Data Types: double

Payoff value, specified as an NINST-by-1 matrix of numeric values, where each element is a 1-by-2 vector in which the first column is Barrier(1)(UB) and the second column is Barrier(2)(LB). Barrier(1) must be greater than Barrier(2).

Note

The payoff value is calculated for the point in time that the Barrier value is reached. The payoff is either cash or nothing. If you specify a double no-touch option using BarrierSpec, the payoff is at the Maturity of the option.

Data Types: double

Output Arguments

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Expected prices for double one-touch options at time 0, returned as an NINST-by-1 matrix.

More About

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Double One-Touch and Double No-Touch Options

Double one-touch options and double no-touch options work the same way as one-touch options, except that there are two barriers.

A double one-touch or double no-touch option provides a payoff if the underlying spot either ever or never touches either the upper or lower Barrier levels. If neither barrier level is breached prior to expiration, the option expires worthless and the trader loses all the premium paid to the broker for setting up the trade. For example, if the current USD/EUR rate is 1.15, and the trader believes that this rate will change significantly over the next 15 days, the trader can use a double one-touch option with barriers at 1.10 and 1.20. The trader can profit if the rate moves beyond either of the two barriers.

References

[1] Haug, E. The Complete Guide to Option Pricing Formulas. McGraw-Hill Education, 2007.

[2] Wystup, U. FX Options and Structured Products. Wiley Finance, 2007.

Introduced in R2019b