Trade Desk, a leading ad-tech company, is set to join the S&P 500, replacing Ansys. This move reflects Trade Desk's strong performance and growing influence in the advertising technology sector. The announcement has fueled a surge in Trade Desk's stock price. Robinhood, a popular online brokerage, was once again not selected for inclusion in the index. This omission continues a trend of Robinhood being overlooked, despite its widespread popularity among retail investors. The S&P 500 inclusion is a significant milestone for Trade Desk, signaling its maturity and stability within the market.