
Digital advertising leader, The Trade Desk (NASDAQ: TTD), recently saw its stock price and trading activity surge. The driver behind this market excitement is a major corporate milestone: The company is set to join the prestigious S&P 500 index, effective before the market opens on July 18, 2025.
This promotion to the big leagues clearly signals the company's scale and importance. For investors, it raises a key question: Is this recent rally just a temporary spike on news, or does it signal a new, sustainable phase of growth?