Anjam,

We can use moment matching to find the "effective" volatility and dividend 
yield for the average.
Then we can apply the European digital option formula.   Attached please find 
the c-code I did
for  Asian spread option, when I find the effective vol and drift for both 
averages then find the option
value by calling the European spread option.  You can do just the same for 
the Asian digital option.

It would be nice to do a Monte-Carlo, just checking the accuracy of the 
approximation.

It was nice to have you here, we are impressed by the work you have done.
Keep up the good work.

Zimin






   
	Enron Capital & Trade Resources Corp. - Europe
	
	From:  Anjam Ahmad                           07/27/2000 10:14 AM
	

To: Zimin Lu/HOU/ECT@ECT
cc:  
Subject: Aluminium Asian Digital Options

Hi Zimin,


Russell Placket of MG Metals just talked to me about the issue of pricing a 
strip of twelve monthly Asian digital options on LME aluminium.  As I 
understand, the payoff to the customer is a fixed cash amount that wil be 
paid if the average of the closing prices of aluminium for a month are 
greater than the strike agreed in advance, where holiday days do not 
contribute to the average.

Russell mentioned that this would be a set of 12 monthly options starting in 
Jan-01, and that the LME price for Jan-01 of $1572.5 (which is the future 
converging to the spot price on the 3rd Wednesday in Jan 01) can be used as a 
proxy/estimate for the average for the month.

Do you have a model for asian digitals or should I proceed with Monte Carlo 
to price this, maybe using European digital option model as control variate?

Thanks,

Anjam
x35383