S&P 500 Dipped in December: 1 Growth Stock to Buy, and 1 Artificial Intelligence (AI) Stock to Sell

The S&P 500 (^GSPC 1.26%) performed very well in 2024, with a 25% gain, but it ended the year on a sour note, with a 3.3% drop in December. The index is relatively expensive right now. It trades at a price-to-earnings (P/E) ratio of 25.1, which is a 38% premium to its long-term average of 18.1 going back to the 1950s. Since there is some uncertainty on the horizon with a new U.S. government preparing to take office, it's possible the S&P 500 drop will persist in the short term.Investors can use market dips ...