Data Field	Definition
Cycle	The month the option's cycle begins.
Exchange	The exchange where the option trades: A- Amex.
Root Symbol	The root symbol of the option.
Strike	The strike price of the option.
Call Code	The two-character code representing a combination of the one-character expiration month code and the one-character strike price code.
Expiration Date	The expiration date of the option.
Type of Change	A one-character code representing the type of change occurring for the strike price. The following codes are used: B - Addition C - Change in strike code D - Delete
Effective Date	The date the strike price is eligible for trading.
Underlying Option Symbol	The symbol of the underlying option.
Underlying Symbol	The symbol of the underlying issue or index.
Description of Change	An explanation of the type of maintenance the entry represents.