[R-SIG-Finance] Using monte carlo simulation to price options

[Moshe Olshansky]

You can use mvrnorm from MASS package to generate multivariate normal distribution. Then if your option is European, using Monte Carlo to price it is straightforward, but this is not the case if the option is American.


--- On Sun, 21/9/08, Chiquoine, Ben <BChiquoine at tiff.org> wrote:

> From: Chiquoine, Ben <BChiquoine at tiff.org>
> Subject: [R-SIG-Finance] Using monte carlo simulation to price options
> To: "r-sig-finance" <r-sig-finance at stat.math.ethz.ch>
> Received: Sunday, 21 September, 2008, 8:55 AM
> Hi,
> 
>  
> 
> I'm trying to use monte carlo simulation to price a
> worst of three asset
> currency option.  I'm trying to follow what Haug does
> in his book "The
> Complete Guide to Option Pricing Formulas" 
> Unfortunately he only
> carries the monte carlo  simulation logic out to an option
> on two assets
> and I'm not able to infer how the underlying asset
> prices should be
> modeled for an option with 3 underlying assets.  I know
> this might not
> be the perfect forum for this question but it was the best
> I could think
> of.  Any help you can provide would be greatly appreciated.
>  The formula
> that Haug gives for simulating two correlated asset prices
> which follow
> geometric Brownian motion is....
> 
>  
> 
> S1+ ChangeS1 = S1exp((u1-1/2*std1^2)*t + std1*a1*sqrt(t))
> 
> S2+ ChangeS2 = S2exp((u2-1/2*std2^2)*t + std2*a2*sqrt(t))
> 
> a1=e1
> 
> a2=rho12*e1+ e2*sqrt(1-rho^2)
> 
> where e1 and e2 are independent random numbers from
> standard normal
> distributions
> 
>  
> 
> Again, Im basically just trying to add an S3 to this model
> so that
> rho12, rho13, and rho23 are all incorporated. Thanks again
> for any
> insight you can provide!
> 
>  
> 
> Ben
> 
>  
> 
>  
> 
> 
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