Q-Variance: or, a Duet Concerning the Two Chief World Systems

David Orrell, while writing a book on the history of money, came up with the idea of applying quantum ideas to finance. Without looking at any data, he made a prediction about the behavior of volatility. In the spirit of a true scientist and almost unique in finance, he went on to test this prediction. Here, David and Paul Wilmott discuss what happened next. There is also a request for assistance from the readers. The full paper follows this dialogue.