Robinhood stock surged over 8% as it joins the S&P 500, along with AppLovin and Emcor, replacing MarketAxess, Caesars, and Enphase on Sept. 22. AppLovin and Emcor saw premarket gains, while MarketAxess, Caesars, and Enphase held steady or dipped slightly. Robinhood’s popularity soared during the pandemic, leading to its IPO, raising $2.1 billion. AppLovin’s market cap skyrocketed over $100 billion by 2024, with revenue hitting $4.7 billion, while Emcor booked $14.57 billion in revenue.

Read more at Yahoo Finance: Robinhood stock rallies as company is set to join S&P 500