BLACKPTPRC Function

Calculates put prices for European options on futures, based on the Black model.

Category:	Financial
Returned data type:	DOUBLE

Syntax

Syntax

BLACKPTPRC(E, t, F, r, sigma)

Arguments

E

is a nonmissing, positive value that specifies exercise price.

Requirement	Specify E and F in the same units.
Data type	DOUBLE

t

is a nonmissing value that specifies time to maturity, in years.

Data type

DOUBLE

F

is a nonmissing, positive value that specifies future price.

Requirement	Specify F and E in the same units.
Data type	DOUBLE

r

is a nonmissing, positive value that specifies the annualized risk-free interest rate, continuously compounded.

Data type

DOUBLE

sigma

is a nonmissing, positive fraction that specifies the volatility (the square root of the variance of r).

Data type

DOUBLE

Details

The BLACKPTPRC function calculates put prices for European options on futures, based on the Black model. The function is based on the following relationship:

table with 1 row and 1 column , row1 column 1 , p u t , equals , c eh l l , plus . epsilon super negative r t end super . open e minus f close , end table

Arguments

specifies the exercise price of the option.

specifies the risk-free interest rate, which is an annual rate that is expressed in terms of continuous compounding.

specifies the time to expiration, in years.

specifies future price.

$table with 2 rows and 2 columns , row1 column 1 , d sub 1 , equals , column 2 fraction open natural log of . open , f over e , close . plus . open , fraction sigma squared , over 2 end fraction , close . t close , over sigma square root of t end fraction , row2 column 1 , d sub 2 , equals , column 2 d sub 1 , minus sigma square root of t , end table$

The following arguments apply to the preceding equation:

specifies the volatility of the underlying asset.

specifies the variance of the rate of return.

For the special case of t=0, the following equation is true:

table with 1 row and 1 column , row1 column 1 , p u t , equals mehx of . open . open e minus f close . comma 0 close , end table

For information about the basics of pricing, see Using Pricing Functions in SAS Functions and CALL Routines: Reference.

Comparisons

The BLACKPTPRC function calculates put prices for European options on futures, based on the Black model. The BLACKCLPRC function calculates call prices for European options on futures, based on the Black model. These functions return a scalar value.

Example

The following statements illustrate the BLACKPTPRC function:

Statements	Results
	----+----1----+-—-2--
select blackptprc(298,.25,350,.06,.25);	1.85980563934967
select blackptprc(145,.5,170,.05,.2);	1.41234979911583

BLACKPTPRC Function

Syntax

Arguments

E

t

F

r

sigma

Details

Comparisons

Example

See Also