Describes the annualised return of the Option if the Market Price of the Underlying Equity does not change. The annualised return will not be available for Option Contracts that expire in 60 days or less. For covered calls, the return is defined by:(Premium - if positive, (Market Price - Strike Price))/Market Price.) For written puts, the return is defined by:(Premium - if positive, (Strike Price - Market Price))/Market Price.) The annualised return is determined by multiplying the return by 12 and dividing it by the number months left to maturity (rounded up).