A trader engages in a specific options strategy involving the stock of XYZ Limited. In this strategy, the trader sells a January 2023 call option with a strike price of USD 50 for a premium of USD 10 and simultaneously buys a January 2023 call option with a strike price of USD 60 for a premium of USD 2. What is the name of this particular trading strategy, and what are the possible maximum gains and losses the trader could encounter at expiration?