Cathie Wood's ARK Investment has made substantial stock purchases in the technology and biotech sectors over recent days, signaling confidence in companies such as Nvidia, Advanced Micro Devices (AMD), and Crispr Therapeutics. On August 4 and 5, ARK Invest acquired 23,200 shares of Nvidia and over 234,000 shares of AMD, investing a combined total exceeding $8 million. These moves come amid the White House lifting the AI chip export ban to China, which has enhanced optimism about future revenue prospects for chipmakers. Concurrently, ARK sold shares in Robinhood Markets amid evolving cryptocurrency regulations. Nvidia's market prominence continues to grow, with its weighting in the MSCI All-Country World Index reaching a record 5.1%, surpassing Japan's 4.7% share and exceeding the combined weights of France and Germany. This underscores Nvidia's rising influence in global equity markets despite recent stock price declines.