MSFT - Earnings AMC today

I have a bearish outlook on Microsoft (MSFT) based on the Stoch, BB, and MACD charts. Due to report earnings today, decided to take advantage of increased volatility and sold an at the money call spread with 3 days till expiration. Not my usual play, but decided to open a small position. Sold the 287.5 calls, bought the 290 calls.