In December, the S&P 500 experienced a slight dip in performance. Despite this, there are still opportunities for investors to consider. One growth stock to consider buying is XYZ Company, which has shown promising potential for growth in the coming months. On the other hand, it may be wise to consider selling shares of ABC Company, an artificial intelligence (AI) stock that has shown signs of weakening. Keeping a close eye on market trends and making informed decisions is key to navigating the stock market successfully.