expiry
B1CEFR level
30/100Rarity: fairly common
TechnicalRegister
The date on which an option or other derivative contract ceases to be exercisable.
Trading grew frantic in the hour before expiry as dealers scrambled to flatten their gamma.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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