Showing posts with label smile slope. Show all posts
Showing posts with label smile slope. Show all posts

Monday, November 26, 2012

constraints on the term structure, smile slope and smile convexity of the implied volatility surface

I have been a professional options trader for over 11 years. In my experience most options traders fail, and for two reasons: naive faith in mathematical models and software, and a basic misunderstanding of the concept of implied volatility.

Describe and explain  the constraints on the term structure, smile slope and smile convexity of the implied volatility surface. Give a numerical example of each in terms of option prices.