Relativistic Quantum Finance
  Employing the Klein-Gordon equation, we propose a generalized Black-Scholes equation. In addition, we found a limit where this generalized equation is invariant under conformal transformations, in particular invariant under scale transformations. In this limit, we show that the stock prices distribution is given by a Cauchy distribution, instead of a normal distribution. 
Juan M. Romero and Ilse B. Zubieta-Mart\'inez
q-fin.MF