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Column Notes:

Delivery Months - This shows the (V)alid, (I)nvalid, and (S)witching delivery months. Valid months are always traded, invalid months are never traded, and switching months are sometimes traded. The characters are presented in the 1-12 month order 'JFMAMJJASOND'.

Conversion Factor - This is needed when converting from CSI's point format into decimal format. If you receive decimal format, it is not needed.

Has Implied 5 - This is also only needed when converting CSI's point representation to decimal. This means to append a '5' to any terminal digit that is a '2' or a '7'. Strike prices for options may also need to have an implied 5 applied.

Last Total Volume - The total volume for all contracts for the most current trading day.

Session Type - RTH stands for regular trading hours, sometimes known as the pit, floor, or day session. It has the settlement in the close field. ETH stands for extended trading hours, sometimes known as the electronic or night session. The combined session has the ETH open, highest high and lowest low of the RTH and ETH, and the settlement in the close field. The pit session has the settlement in the close field.

Point and Tick Values - See here for point and tick value notes.

Divide Strike - When converting a points representation strike to match the decimal futures price, it must be divided or multiplied by the value in this column.