Group 1 - ARK Invest's Cathie Wood significantly increased holdings in Nvidia by purchasing 34,543 shares ahead of the company's earnings report [1][2] - The flagship ARK Innovation ETF (ARKK) added 21,504 shares, while the ARK Next Generation Internet ETF (ARKW) bought 13,039 shares, raising Nvidia's ranking in ARKK to 29th and in ARKW to 24th [1] - This buying activity contrasts sharply with ARK's previous trading pattern, where 8 out of 10 transactions since November 2022 were sell-offs, with only two purchases occurring recently [1] Group 2 - Nvidia is positioned as a core stock for the 2024 AI market, with its earnings report expected to be released shortly [2] - Cathie Wood's unusual buying decision coincides with a critical moment for Nvidia's performance guidance, indicating a potential shift in ARK Invest's strategy towards AI leaders [2] - Despite not being in ARKK's top ten holdings, Nvidia's weight has significantly increased since the end of Q1, reflecting the growing demand for AI computing power [2]