Loretan-Phillips maximal moment exponent estimators are used to investigate the distribution of S&P 500 stock returns at a range of different frequencies. In all cases, the variance is found to be finite, but the existence of higher-order moments is in some doubt.

We use a data set consisting of a complete history of all transactions and quotes to examine intraday patterns in trading volume, volatility and the quoted bid-ask spread in the market for FTSE-100 index futures. We document a number of regularities in the pattern of daily returns and volatility...

This paper presents and tests a model of the volatility of individual companies' stocks, using implied volatilities derived from option prices. The data comes from traded options quoted on the London International Financial Futures Exchange. The model relates equity volatilities to corporate...