Opendoor Technologies Inc. shares have surged sharply as retail investors aggressively increased their positions, fueling what analysts describe as a renewed 'meme stock' rally. The stock jumped an additional 10% on July 17, 2025, amid growing bullish sentiment and comparisons to past short squeeze events like Carvana. Market observers note that retail investors, particularly mom-and-pop traders, now account for 14% of single-stock trading volume, the highest level on record and surpassing previous peaks during the meme stock mania. This heightened retail activity is also evident in their substantial holdings in major U.S. technology companies, with individual investors collectively holding over $1 trillion in NVIDIA, Apple, and Tesla stocks. The surge in Opendoor shares reflects a broader trend of increased retail participation in the stock market, particularly in tech and high-volatility stocks.