An option is at the money (ATM) when the current value of the underlying (here, the index level) is equal to the option’s strike price. That definition matches the question exactly, making B correct. ATM status is one of the core “moneyness” classifications tested on the SIE along with in the money (ITM) and out of the money (OTM).
For a call option, the option is ITM when the underlying index level is above the strike price (because exercising would allow purchase at the strike below the market), and OTM when the index level is below the strike. For a put option, it’s the reverse: ITM when the underlying is below the strike, and OTM when the underlying is above the strike. When the index level equals the strike, neither a call nor a put has intrinsic value based on immediate exercise, so it is ATM.
Choice A and C are incorrect because “in” and “out of the money” require the underlying to be above or below the strike, not equal. Choice D is incorrect because an option trading at “intrinsic value only” implies it has no time value and is priced exactly at intrinsic value. But ATM options have zero intrinsic value by definition; their premium (if any) is typically all time value, reflecting volatility and time remaining until expiration.
This question reinforces the SIE’s options fundamentals: strike price, premium, intrinsic vs time value, and how moneyness is determined using the underlying level relative to the strike.
