South Korean Retail Investors Buy $796M SpaceX (SPCX-US) Stock on Listing Day, Prompting Brokerage Probe

South Korean retail investors aggressively purchased nearly $796 million in SpaceX (SPCX-US) stock on its listing day, June 12, 2026, signaling robust demand after being unable to participate in the initial public offering. This surge made SpaceX the most favored U.S. stock among South Korea's 14 million retail investors. Data from the Korea Securities Depository (KSD) shows the single-day net buy exceeded cumulative net purchases for any other U.S. stock over the prior three months. SpaceX shares have since climbed 49%, pushing its market capitalization to $2.65 trillion, surpassing Amazon (AMZN-US). South Korean brokerage Mirae Asset Securities, an IPO underwriter, failed to secure any allocation, prompting an expanded investigation by the Financial Supervisory Service (FSS). The strong interest reflects Elon Musk's significant following in South Korea, where retail investors held $25.9 billion in Tesla (TSLA-US) stock as of June 15, 2026. An ETF investing in SpaceX also saw $301 million in net inflows over the past month.