Tonight, after the market closes, S&P 500 index changes for the first quarter of 2026 are expected to be announced. Index funds must buy any newly added stocks, which typically drives significant price appreciation for additions, making this one of the most closely watched calendar events for traders and long-term investors alike. Three names generating ... S&P 500 Rebalancing Tonight: Could Vertiv, SoFi, or Lumentum Join the Index?