An "At The Money" (ATM) straddle is a specific type of options trading strategy that involves simultaneously buying a call option and a put option with the same strike price and expiration date. The term "at the money" refers to the situation when the strike price of the options is the same as the current market price of the underlying asset. Traders implement this strategy when they expect a significant price movement in the underlying asset but are uncertain about the direction of this movement. The trader profits if the price moves significantly either up or down, covering the total cost of both the call and put options. While the potential profit for an ATM straddle is theoretically unlimited (since the price of the underlying asset could rise or fall indefinitely), the risk is limited to the total premium paid for both the call and the put options. However, if the price of the underlying asset remains close to the strike price as the expiration date approaches, both options could expire worthless, and the trader would lose the entire premium paid for the straddle. This strategy is therefore best used in volatile markets or in anticipation of a major news event that is expected to cause significant price movement.