We overview different methods of modeling volatility of stock prices and exchange rates, focusing on their ability to reproduce the empirical properties in the corresponding time series. The properties of price fluctuations vary across the time scales of observation. The adequacy of different...

This paper provides a quantitative perspective on Gene Fama's influence on the scholarly community. He has more than 140,000 Google cites while the median number of citations for the Fellows of the American Finance Association is 32,792. Gene Fama has published highly-cited papers in six...