The S&P 500 experienced a dip in December, causing investors to reevaluate their portfolios. During times of market uncertainty, it is important to consider which stocks to buy and sell. One growth stock that stands out as a potential buy is XYZ Company, which has shown consistent growth and strong performance. On the other hand, it may be wise to consider selling shares of ABC Company, an artificial intelligence (AI) stock that has not been meeting expectations. By carefully selecting which stocks to add to your portfolio and which ones to remove, you can navigate market fluctuations with confidence.