In the fourth quarter, the well-known investor Duan Yongping made a notable move by substantially cutting down his stake in Apple, which previously constituted his largest holding. Simultaneously, he bolstered his position in Nvidia, multiplying his share count by over 11 times, with an addition of 6.6393 million shares, bringing the total to 7.2371 million shares. This surge propelled the market value of his Nvidia holdings to $1.35 billion, securing its place as the third-largest investment in his portfolio. Furthermore, Duan augmented his stakes in five other stocks during Q4, with Berkshire Hathaway experiencing the second-highest increase. He also trimmed his positions in four stocks, excluding Apple. Concurrently, he ventured into the AI vertical sector by taking minor stakes in three up-and-coming tech firms—CoreWeave, Credo Technology, and Tempus Ai—comprising roughly 0.28% of his overall portfolio, thereby strategically zeroing in on pivotal segments of the AI industry chain.