Component 
Resolution  Vanilla Options 




Function Definition 
oGBS_IS(CallPut, OptionValue, ValueDate, MaturityDate, Exercise, Volatility, RiskFree, NetCarry) Uses the NewtonRaphson iteration procedure to calculate the implied spot price that equates the given market price of the option with the Generalized BlackScholes model price of the option. Returns the implied spot only. 




Option Types 
European options on Stocks, Currencies, Futures, and Commodities. 




Function Parameters 



Parameters 
Description 

Parameter Type 

Restrictions 

. 

CallPut 

Option type. 

Enumerated Constant 

1  Call 

OptionValue 

Current market price of the option. 

Double 

Option Value > 0 

ValueDate 

Valuation date of the option. 

Date 

ValDate < MatDate 

MaturityDate 

Maturity date of the option. 

Date 

MatDate > ValDate 

Exercise 

Exercise price of the option. 

Double 

Exercise > 0 

Volatility 

Annualized volatility of the underlying asset, expressed as a decimal. 

Double 

Volatility > 0% 

RiskFree 

Risk free interest rate, entered as either a single rate (act/365) or as a user defined zero curve object. 

Double or Curve 

RiskFree >= 0% 

NetCarry 

The net cost of carry, entered as either a single rate or as a user defined rate curve object. See net cost of carry definitions for different option types. 

Double or Curve 


Copyright 2013 Hedgebook Ltd.