Core Viewpoint - OpenDoor's stock price experienced a dramatic surge, rising from under $1 to a peak of $4.97 within six trading days, indicating extreme volatility and investor interest in low-priced stocks [1][3]. Group 1: Stock Performance - From July 14 to July 21, OpenDoor's stock price increased by over 500% [5]. - On July 21, the stock saw a trading volume of 1.9 billion shares, leading to trading halts due to volatility [1]. - The stock price fluctuated significantly, with a 121% intraday increase and subsequent drops, showcasing high volatility [1]. Group 2: Market Context - The recent surge in OpenDoor's stock has drawn comparisons to the "retail investor battle against Wall Street" and the 1999 internet bubble [3]. - A notable increase in call option trading for OpenDoor was observed, with over 2 million contracts traded on July 21, marking the third-highest daily volume for individual stocks this year [3]. - The broader market has seen a rise in trading activity for low-priced stocks, with low-priced stocks accounting for over 47% of total trading volume, the highest recorded level [4]. Group 3: Company Overview - OpenDoor operates as an online real estate buying and selling platform, leveraging software and data science to enhance the transaction experience for buyers and sellers [3]. - The company's primary revenue model is based on the "buy-sell spread," and it has not reported any profitable fiscal year since its merger with a special purpose acquisition company in 2020 [3].

Core Viewpoint - OpenDoor Technologies has experienced a significant surge in stock price, becoming the latest "meme stock" in the U.S. market, with a rise of 312% over six trading days, attracting retail investors and drawing comparisons to the 1999 internet bubble [1][3]. Stock Performance - The stock price increased from approximately $1 to a peak of $4.97, with a trading volume of 1.9 billion shares on July 21, marking a 1700% increase compared to the three-month average [1][2]. - The UBS meme stock index rose by 4% on the same day, indicating a broader trend in the meme stock sector, with other stocks like QuantumScape and Bit Mining also seeing significant gains [2]. Retail Investor Behavior - The current enthusiasm among retail investors is likened to the 1999 internet bubble, with notable activity on social media platforms such as X and Reddit's WallStreetBets forum, which have fueled the stock's volatility [3]. - Approximately 24% of OpenDoor's free float is shorted, contributing to a potential short squeeze scenario similar to the GameStop incident in 2021 [3]. Options Trading Activity - OpenDoor's options trading volume reached a record high of over 3.4 million contracts, more than doubling from the previous day, with a significant portion focused on short-term options expiring soon [5]. - The most active call options at the $4.5 strike price had an average trade size of only 11 contracts, indicating that most activity is driven by retail investors [5]. Other Meme Stocks - Other meme stocks have also shown strong performance, with QuantumScape rising nearly 200% and Bit Mining increasing by 87% over the past month [4]. Company Fundamentals - OpenDoor, which went public through a merger with a special purpose acquisition company in 2020, has seen its stock decline by 51% prior to the recent surge, raising questions about its fundamental business performance [5]. - The company operates an online platform for buying and selling real estate in the U.S. and faces challenges from changing interest rates and adjustments in the real estate market [5].