dbltouchbybls

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

Syntax

Price = dbltouchbybls(RateSpec,StockSpec,Settle,Maturity,BarrierSpec,Barrier,Payoff)

Description

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.

Note

Alternatively, you can use the DoubleTouch object to price double touch options. For more information, see Get Started with Workflows Using Object-Based Framework for Pricing Financial Instruments.

Examples

Price a Double No-Touch Option

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

AssetPrice = 105;
Rate = 0.1;
Volatility = 0.2;
Settle = datetime(2018,1,1);
Maturity = datetime(2018,6,1);

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 = 
6.3082

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, 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

Settle — Settlement or trade date

datetime array | string array | date character vector

Settlement or trade date for the double touch option, specified as an NINST-by-1 vector using a datetime array, string array, or date character vectors.

To support existing code, dbltouchbybls also accepts serial date numbers as inputs, but they are not recommended.

Maturity — Maturity date

datetime array | string array | date character vector

Maturity date for the double touch option, specified as an NINST-by-1 vector using a datetime array, string array, or date character vectors.

To support existing code, dbltouchbybls also accepts serial date numbers as inputs, but they are not recommended.

BarrierSpec — Double barrier option type

cell array of character vectors with values of 'DOT' or 'DNT' | string array with values of "DOT" or "DNT"

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

Barrier — Double barrier value

numeric

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 — Payoff value

numeric

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

Price — Expected prices for double one-touch options

matrix

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

More About

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.

Version History

Introduced in R2019b

R2022b: Serial date numbers not recommended

Although dbltouchbybls supports serial date numbers, datetime values are recommended instead. The datetime data type provides flexible date and time formats, storage out to nanosecond precision, and properties to account for time zones and daylight saving time.

To convert serial date numbers or text to datetime values, use the datetime function. For example:

t = datetime(738427.656845093,"ConvertFrom","datenum");
y = year(t)

y =

        2021

There are no plans to remove support for serial date number inputs.