Cathie Wood’s ARK Invest purchased 78,965 Nvidia shares worth $15.6 million across five of its largest ETFs on July 28, 2026, during a sharp selloff in the chip sector. The purchase came as Nvidia stock fell nearly 5 percent, erasing roughly $250 billion in market value. The selloff was triggered by reports that Nvidia was discussing providing as much as $250 billion in financing guarantees to support an OpenAI data-center project, raising concerns about circular financing in the artificial intelligence industry. ARK spread the buy across the ARK Innovation ETF (ARKK), ARK Next Generation Internet ETF (ARKW), ARK Autonomous Technology & Robotics ETF (ARKQ), ARK Fintech Innovation ETF (ARKF), and ARK Genomic Revolution ETF (ARKG). On the same day, ARK also picked up $12.4 million in Tesla shares and $12.2 million in SpaceX stock, bringing the total value of purchases across the three companies to roughly $40 million. The move typifies Wood’s long-standing investment philosophy of buying during market weakness. ARK had sold out of Nvidia in January 2023, citing overvaluation concerns, before the stock surged more than 160 percent in the following months. In June 2026, ARK bought $63.3 million worth of Nvidia shares. Wood’s repeated buying during dips suggests she views pullbacks as temporary corrections in a