There are predictions that a certain ai stock will be added to the S&P 500, with some outlets suggesting it could happen before the end of the year or in the first quarter of 2026. However, it is unclear which specific stock will be added, with various companies mentioned as possibilities. Some reports indicate that certain stocks, including Lumentum, Coherent, and Vertiv, have already been added to the S&P 500, while others speculate about the potential impact of ai stocks on the index.