The S&P 500 is set to undergo its quarterly rebalancing, with the next update scheduled for March 20, 2025. This process typically occurs on the third Friday of March, June, September, and December, and involves announcing which stocks will be added to or removed from the index. The most recent reshuffling of S&P's key indexes is aimed at better reflecting the relative market capitalizations of the included companies. Analysts estimate that approximately $33.1 billion in required index rebalance trades will be executed before the market opens on March 24, 2025.