Since the launch of ChatGPT in late 2022, the S&P 500 has increased its market value by approximately $33 trillion. Bloomberg analysts suggest that a potential slowdown in the artificial intelligence sector could jeopardize these gains, as the market has become heavily reliant on the AI boom.
On September 14, 2026, Anthropic CEO Dario Amodei publicly advocated for a deceleration in AI development due to safety concerns. This statement triggered an immediate market response: Nvidia shares declined by 3.4%, while SoftBank stock fell by 10.7%. Similar concerns have previously been voiced by Elon Musk and Sam Altman.
Data from Bloomberg Economics indicates that AI-related investments accounted for nearly half of US GDP growth over the past year, during which the economy grew by approximately 2%. Furthermore, US venture capital funding reached over $400 billion in the first half of 2026, with the majority directed toward AI startups.
Investor interest remains highly concentrated in the technology sector. Since late March 2026, inflows into IT-focused ETFs have reached $52 billion, compared to $4 billion for the rest of the market. This creates a 13-to-1 ratio, which analysts note is a level of concentration that has historically preceded significant market rotations.
