The file contains exchange volume data for contracts traded and open interest on a yearly basis. Each file contains a record for each month of the given year. The file for the current year is updated daily and overwites the file created on the previous business day. The file is exported each morning with data as-of the previous business day representing month-to-date and year-to-date where applicable.
The file is published daily at 07:30 CT for the previous business date.
The file is comma separated value (CSV) with column headers in the first row.
Number of trading days in the given month, up to and including AsofDate
Trading volume for the given month
Average trading volume for each day in the given month
Trading volume from the same month of the previous year
Percentage change between the trading volume of the current month and same month of the previous year - if there is no data for the same month of the previous year, a value for this field is not provided