Anybody see Nova the other night. It was about the "Formula That Shook the World" - the Black-Scholes Formula to determine how much a call option is worth at any given time. <A HREF="http://www.siliconinvestor.com/stocktalk/msg.gsp?msgid=15752163" target="_new">http://www.siliconinvestor.com/stocktalk/msg.gsp?msgid=15752163</A> I can e-mail the link to anyone who wants it. I got it from my broker. rose