Opendoor Technologies Inc. (NASDAQ: OPEN) has experienced an extraordinary surge in its stock price and trading activity throughout July 2025, driven primarily by retail investor enthusiasm and social media endorsements. The stock price soared from approximately $0.50 at the beginning of the month to nearly $5, marking an increase of over 800% in July alone. This rally has been accompanied by record-breaking call option volumes, with daily contracts reaching as high as 3.4 million and total call volumes hitting around 2.26 million on peak days, among the highest for any U.S. stock in 2025, trailing only major names like Nvidia and Tesla. On July 21, Opendoor shares more than doubled in a single day, climbing 42% before trading was halted due to extreme volatility. The stock has traded over 1.8 billion shares in a single session, accounting for nearly 10% of the total U.S. stock market volume on that day, and traded 298% of its closing market capitalization, levels comparable to the peak trading frenzy seen in GameStop in January 2021. The rally has been fueled by a combination of a hedge fund manager's social media endorsement, notably from Eric Jackson, who has projected a price target of $82 per share, and widespread retail interest that has cemented Opendoor's status as the latest meme stock. Despite the rapid price appreciation, the surge appears to be driven more by speculative trading and gamma squeezes from out-of-the-money call options rather than fundamental business developments. Opendoor operates in the real estate technology sector, which has faced challenges including a nearly 50% decline in existing-home sales since the company went public in late 2020. Market commentators have cautioned investors to approach the stock carefully given its volatility and speculative nature, even as some view it as a potential growth opportunity amid expectations of Federal Reserve rate cuts. The company's market capitalization has risen to approximately $3.2 billion amid this retail-driven frenzy.