Key Points
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The S&P 500 has rallied at least 15% for three consecutive years, primarily due to the AI revolution.
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Nvidia’s market value surged by over $4.2 trillion, while Palantir’s shares increased by more than 2,500% during this period.
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In 2025, insiders at Nvidia and Palantir sold shares totaling over $3.3 billion, raising concerns about future performance.
From 2023 to 2025, the S&P 500 experienced its third-largest three-year rally, largely fueled by advancements in artificial intelligence (AI). Nvidia (NASDAQ: NVDA) and Palantir Technologies (NASDAQ: PLTR) notably led the sector, with Nvidia’s market capitalization expanding by more than $4.2 trillion and Palantir’s stock soaring over 2,500% during this period.
However, mixed signals from company insiders have raised concerns for investors. In 2025, Nvidia executives sold approximately $2.16 billion in shares, while Palantir insiders sold around $1.15 billion. The lack of recent insider buying at both companies could indicate caution moving forward, especially given the historically unsustainable price-to-sales ratios of Nvidia and Palantir, now exceeding 30 and 110, respectively.
