Free Stuff

Volopta
I created this site to share derivatives pricing code in C++, Matlab, VBA, and other languages. Feel free to visit the site and download all the code you need, but kindly adhere to the terms of use of the site. You may of course submit your own code to share with others, but please limit your contribution to derivatives pricing only -- I want to keep the site specialized.

http://www.Volopta.com/

Mathematical Finance notes
Sometimes papers and books on mathematical finance leave out many steps in the derivation of formulas and concepts, or sometimes these derivations are unclear. I created a bunch of notes in PDF format that, in my humble opinion, explain concepts in a clear and rigorous fashion.

Stay tuned, plenty of stuff to come!

Derivation of the Black Scholes PDE

Heuristic derivation of Ito's Lemma

Derivation of Dupire's local volatility

Derivation of the Fokker Planck equation

Derivation of a variance swap

Decomposition of the payoff function

The SABR Model

Relationship between butterfly spreads and the RND