The waiting-time distribution of LIFFE bond futures
  We apply the Continuous Time Random Walk (CTRW) framework, introduced in finance by Scalas et al., to the analysis of the probability distribution of time intervals between two consecutive trades in the case of BTP futures prices traded at LIFFE in 1997. Results corroborate the validity of the CTRW approach for the description of the temporal evolution of financial time series. 
Marco Raberto, Enrico Scalas, Rudolf Gorenflo and Francesco Mainardi