According to CoinMeta, Ark Invest announced a major adjustment to its portfolio on September 29, 2026, purchasing $81 million worth of Nvidia ( NVDA ) stocks and simultaneously selling approximately $110 million worth of AMD stocks. Ark Invest acquired 356,681 shares of Nvidia stocks across four ETF transactions, and this purchase coincided with the board of directors' authorization to expand stock repurchases to $150 billion. Analysts believe that this move demonstrates the board's confidence. Nvidia stocks rose by about 22% in 2026, while AMD rose by about 184% during the same period. Analysts expect Nvidia and AMD to continue to rise, but they also express concerns about potential AI bubbles.