What are Vanna Charts? Vanna Charts depict the rate at which dealer hedging changes relative to the volatility of the underlying stock or index. Subscribers can access SpotGamma's Vanna Charts here. Related articles How do I use Vanna Charts? When do the Vanna Chart levels update? What is the SpotGamma Daily Founder's Note? What is Bookmap? What is the SpotGamma Gamma Index?