Find a potential function for the field 
by inspection.
Definitions:
Options Contract
A financial agreement granting the buyer the opportunity, but not the obligation, to buy or sell an asset at a specific price on or before a certain date.
Forward Contract
A personalized agreement between two individuals to purchase or sell a property at a designated future time at a price determined currently.
Futures Contract
A standardized legal agreement to buy or sell a specific commodity or asset at a predetermined price at a specified time in the future.
Interest Rate Collar
A financial derivative strategy used to limit the range of possible interest rates movements by buying and selling interest rate options.
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