A trader engages in an options trading strategy on XYZ Limited's stock by simultaneously selling a January 2023 call option with a strike price of USD 50 for a premium of USD 10 and purchasing a January 2023 call option with a strike price of USD 60 for a premium of USD 2. Identify the term used to describe this type of trading strategy. Additionally, calculate the potential maximum profit and maximum loss for the trader at the expiration date of these options.